Sovereign CDS Spreads in Europe: The Role of Global Risk Aversion, Economic Fundamentals, Liquidity, and Spillovers

Contributor Notes

Authors’ E-Mail Address:fheinz@imf.org, ysun@imf.org

By analysing data from January 2007 to December 2012 in a panel GLS error correction framework we find that European countries’ sovereign CDS spreads are largely driven by global investor sentiment, macroeconomic fundamentals and liquidity conditions in the CDS market. But the relative importance of these factors changes over time. While during the 2008/09 crisis weak economic fundamentals (such as high current account decifit, worsening underlying fiscal balances, credit boom), a drop in liquidity and a spike in risk aversion contributed to high spreads in Central and Eastern and South-Eastern European (CESEE) countries, a marked improvement in fundamentals (e.g. reduction in fiscal deficit, narrowing of current balances, gradual economic recovery) explains the region’s resilience to financial market spillovers during the euro area crisis. Our generalised variance decomposition analyisis does not suggest strong direct spillovers from the euro area periphery. The significant drop in the CDS spreads between July 2012 and December 2012 was mainly driven by a decline in risk aversion as suggested by the model’s out of sample forecasts.

Abstract

By analysing data from January 2007 to December 2012 in a panel GLS error correction framework we find that European countries’ sovereign CDS spreads are largely driven by global investor sentiment, macroeconomic fundamentals and liquidity conditions in the CDS market. But the relative importance of these factors changes over time. While during the 2008/09 crisis weak economic fundamentals (such as high current account decifit, worsening underlying fiscal balances, credit boom), a drop in liquidity and a spike in risk aversion contributed to high spreads in Central and Eastern and South-Eastern European (CESEE) countries, a marked improvement in fundamentals (e.g. reduction in fiscal deficit, narrowing of current balances, gradual economic recovery) explains the region’s resilience to financial market spillovers during the euro area crisis. Our generalised variance decomposition analyisis does not suggest strong direct spillovers from the euro area periphery. The significant drop in the CDS spreads between July 2012 and December 2012 was mainly driven by a decline in risk aversion as suggested by the model’s out of sample forecasts.

Executive Summary

The purpose of this paper is to determine what has been behind movements in sovereign CDS spreads in the CESEE region during the 2007–12 period. Specifically, what has been the role of global risk aversion, specific macroeconomic fundamentals, liquidity conditions in the CDS market, and spillovers from other countries in explaining the divergent movements in CDS of different countries witnessed during this period? Has the role of these factors changed between the two main stress episodes during this period—the aftermath of Lehman Brothers and the euro area crisis?

To attribute the movements in sovereign CDS spreads to the various contributing factors, we use a generalized variance decomposition method on daily data to detect cross-country influences in the CDS market, and a dynamic panel regression framework on monthly data to measure the impact of macroeconomic fundamentals on CDS spreads.

Our results indicate that while spreads in the CESEE region are primarily driven by changes in the global investor sentiment, country specific macroeconomic fundamentals1 and CDS market liquidity conditions play an important role as well. Among the fundamental factors, growth prospects and forward looking fiscal indicators (e.g. one year ahead fiscal deficit forecasts) appear particularly important. The role of fundamentals is particularly strong for high debt and low growth countries. The impact of liquidity conditions is very prominent during the global liquidity shock in the 2008/09 crisis, but has been much smaller afterwards.

The results in this paper suggest that the improvement in CESEE country-specific fundamentals (including the reduction in fiscal deficit, and sharp narrowing of current account balance, as well as a gradual acceleration in growth) has been a key reason why CDS spreads in the CESEE region were relatively less affected by the euro area crisis. Spillovers of the euro area crisis to the region largely occurred through the impact of the crisis on global risk aversion, while the negative impact on CESEE CDS spreads are partially offset by much improved fiscal and current account balances compared to the 2008/09 crisis period.

An out of sample forecast based on the panel results suggest that the sharp drop of CDS spreads across the board in the second half of 2012 following the ECB’s OMT announcement was to a large extent due to a drop in risk aversion as country specific fundamentals remained on average broadly unchanged or (in the case of growth prospects) deteriorated somewhat.

I. Introduction2

Views differ on what drives sovereign CDS spreads. Some argue that CDS spreads mainly reflect capital markets’ perception of a particular country’s default risk. Others emphasize the importance of spillovers from other countries. Indeed, some policy makers complain that indiscriminate spillovers from other countries cause their spreads to rise and hurt their countries as “innocent bystanders.” Some observers, however, discount much of the innocent bystander claim and argue that countries with weak fundamentals might be especially vulnerable during periods of market turmoil.

Against this background, this paper aims to address two questions. First, what has been the extent of spillover to CDS spreads in CESEE between January 2007 and December 2012? Second, to what extent are sovereign CDS spreads determined by a country’s own fundamentals? We analyze data over the period between January 2007 and December 2012—a period where there have been two distinct episodes of large movements in these spreads.3 We compare spillovers during the euro area crisis (between May 2010 and June 2012), with spillovers during the global financial and economic crisis in 2008/09, explore the role of country fundamentals in explaining sharp differences in CDS spreads during these two periods, and also provide an out of sample forecast of CDS spread developments in the second half of 2012 to gauge model performance.

The paper addresses spillovers and CDS spreads’ link with fundamentals separately. We first investigate, using daily data, the significance of cross-country spillovers for short term CDS spread movement, assuming that common factors (e.g. changes in the market’s risk appetite) affect all countries’ CDS spreads simultaneously. We then analyze, using monthly data, the link between country specific fundamental and CDS spreads, while controlling for global risk aversion and liquidity in the CDS market.

As a preview of the paper’s findings, we uncover little empirical support for claims of strong spillovers in CDS spreads from euro area periphery to CESEE. We find clear and strong linkages between CDS spreads, global risk appetite, and country specific fundamentals and liquidity in the CDS market. The quantitative effect of direct spillovers from the euro area periphery on CESEE’s CDS spread is very small. In contrast, we find that CDS market dynamics can be captured relatively well as following an error-correction process where CDS spreads evolve around a level that is linked with economic fundamentals and specific market conditions (such as liquidity of the CDS market). Short term dynamics is driven by frequent adjustments in the market perception of fundamentals, with occasional over- and undershooting.

The rest of the paper is structured as follows. Section 2 discusses developments in CDS spreads and macroeconomic fundamentals in the CESEE region. Section 3 presents a brief literature review. Section 4 describes the data. Section 5 presents results on spillovers between CESEE and euro area CDS spreads based on a generalized variance decomposition approach. Section 6 introduces estimation results linking CDS spread levels and dynamics with global risk aversion, liquidity and country specific macroeconomic fundamentals. We estimate the model over the period between January 2007 and December 2012 and conduct out of sample forecast for the second half of 2012 to test the model’s properties and to explain the marked drop in CDS spreads across the board in that period. Section 7 concludes with some remarks on policy implications.

II. Developments in Sovereign CDS Spreads and Fundamentals

CDS spreads in the CESEE region have seen two distinct stress periods in recent years (see Figure 1). These periods broadly followed changes in global risk aversion, as proxied by the VIX index. First, CDS spreads in CESEE moved up very sharply in 2008/09 during the global financial and economic crisis. Between Spring 2009 and Summer 2011, CDS spreads in the region moderated considerably in spite of the start of the euro area crisis around May 2010. In second half of 2011, CDS spreads have increased sharply following the intensification of the euro area crisis, but overall they remained much below their peak levels during the first crisis. In 2012, CDS spreads were moderating in the region, with a sharp decline in the second half of the year.

Figure 1.
Figure 1.

Average 5-year Sovereign CDS Spreads (in basis points, lhs axis) and the VIX Index* (rhs axis)

Citation: IMF Working Papers 2014, 017; 10.5089/9781484393017.001.A001

Sources: Datastream, Notes: * the VIX index (Chicago Board Options Exchange Market Volatility Index) represents one measure of the market’s expectation of stock market volatility over the next 30 day period, and often interpreted as a global indicator of risk aversion (or fear factor).

CDS spreads in the CESEE region as a whole appear to be far less affected by the euro area crisis than the preceding 2008-09 crisis following the Lehman collapse. The difference is striking when one compares the development of average CDS spreads in the CESEE countries with that of the euro area periphery countries. While during the global financial crisis in end 2008 and early 2009, dramatic spikes in CDS spreads occurred in CESEE where many countries suffered from large imbalances, CDS spreads in the euro area periphery countries were very low. With the help of large external assistance through IMF-EU programs and dramatic economic adjustment (e.g. in fiscal deficits, labor costs, and prices) in a number of countries, large imbalances in the CESEE region were corrected and CDS spreads in the region declined to a level much below the crisis peaks by early 2010. The much lower CESEE spreads stand in sharp contrast with rapidly rising CDS spreads of the euro area periphery countries following the start of the euro area crisis around May 2010. Indeed, by June 2012, most CESEE countries had lower CDS spreads than any of the euro area periphery countries. Sovereign CDS spreads of the Czech Republic and Estonia were even lower than that of France and Austria, while a whole list of CESEE countries, including the Czech Republic, Estonia, Turkey, Slovakia, Russia and Poland had lower CDS spreads than Belgium, a country in the very core of the euro area (see Table 1).

Table 1.

Average Monthly 5-year Sovereign CDS Spreads in Selected CESEE and Euro Area Countries

article image
Sources: DatastreamNote: This table shows the ranking of selected CESEE and euro area countries by CDS spreads (starting from the highest spreads) presenting monthly averages of daily CDS spreads in 4 periods, including March 2009 (the date marking the end of the 2008-2009 global crisis and the peak of the crisis in Central and Eastern Europe), May 2010 (the start of the euro area crisis), July 2011, a month when the euro area crisis escalated and June 2012 the end of our sample period. The pink cells refer to the CESEE countries.

At first sight, the relative resilience of the CESEE region during the euro area crisis appears surprising given the close economic and financial links between the two regions. For the CESEE countries, given their strong ties with the euro area (e.g. through trade and finance) and the high openness of the majority of countries in the region, it appears plausible to assume that a crisis of the significance of the euro area crisis would have a profound impact on the market’s perception about risk in the CESEE region. With CDS spreads affecting costs of financing in both the public and private sector in CESEE, elevated CDS spreads would dampen economic growth especially in an economic downturn.4

Developments in the region since March 2009 (the turning point of the 2008–09 crisis) indicate that country specific macroeconomic fundamentals may have been affecting strongly sovereign CDS spreads in CESEE. By end 2009- early 2010, most of the countries have emerged from the region’s own crisis in 2007, the last leg of the boom and bust cycle that started in early 2000s. By 2012, real GDP is above pre-crisis peak in levels in the three largest countries (Russia, Turkey, and Poland) and Slovakia (see Figure 2). GDP is also up significantly from crisis-lows in all other countries except for Slovenia and Croatia. External imbalances have generally disappeared. Fiscal balances have also improved from the lows immediately after the crisis (see Figure 3 and 4). However, for Hungary and Ukraine, lingering concerns on their policies have kept their sovereign CDS spreads elevated. In contrast, investors have experienced a long series of bad news on the fiscal woes and low growth prospects of the euro area periphery countries in recent years.

Figure 2.
Figure 2.

Real GDP Level: Deviation from Pre-Crisis Peak

(Percent)

Citation: IMF Working Papers 2014, 017; 10.5089/9781484393017.001.A001

Source: Haver
Figure 3.
Figure 3.

CESEE: Current Account Balance

(Percent of GDP)

Citation: IMF Working Papers 2014, 017; 10.5089/9781484393017.001.A001

Source: IMF, World Economic Outlook database.
Figure 4.
Figure 4.

CESEE: Fiscal Balance

(Percent of GDP)

Citation: IMF Working Papers 2014, 017; 10.5089/9781484393017.001.A001

Source: IMF, World Economic Outlook database.

III. Literature Review

We follow the literature and investigate three main contagion channels: the related information channel, the risk aversion channel, and the liquidity channel, as described in Longstaff (2010). The related information channel suggests that the reason for the contagion is a real economic link between two countries. The risk aversion channel means that the contagion effect is transmitted via the impact of a shock in one market on global risk aversion. Finally the liquidity channel refers to a situation when a shock in one market triggers a drop in liquidity in other markets.

A growing strand of literature uses the vector autoregressive (VAR) framework to analyze spillovers. Similarly to the works of Favero and Giavazzi (2002) and Alter and Beyer (2012) on the dynamics of spillover effects during the euro area crisis, we use a VAR model to capture interdependencies between variables in the system, taking into account their own lagged effect.

More specifically, we use the generalized impulse response/variance decomposition (GIR/GVD) method originally developed by Shin and Pesaran (1998), which offers a number of advantages compared to earlier methods. The key advantage of this method is that the results are not dependent on the ordering of shocks (in contrast with the often applied Cholesky decomposition). This has two main benefits.5 First, there is no need to make arbitrary decisions about the direction of shocks, which increases the robustness of results. This is very useful, since economic theory gives no guide about the direction of financial market spillovers between countries. Furthermore, it is possible to analyze simultaneously the interaction between a large number of series without the need to calculate all possible permutation of ordering between the individual shocks.

We follow the literature with regards to the role of fundamentals in explaining CDS spread levels and dynamics by identifying three set of factors: macroeconomic fundamental, global risk aversion, and liquidity. A number of papers suggest that CDS spreads are largely dominated by global factors. For example, Pan and Singleton (2008) find a strong link between sovereign credit risk and global risk aversion proxied by the VIX index. The role of liquidity is also well established in the literature. Tang and Yan (2007) find that corporate CDS spreads contain a significant illiquidity premium in the corporate CDS market which is reflected in the bid-ask spread. Extending this insight to the euro area sovereign CDS market, Fontana and Scheicher (2010) also use the bid-ask spread to explain movements in CDS spreads and the pricing of sovereign bonds. Similarly, Badaoui, Cathcart, and El-Jahe (2013) find that sovereign CDS spreads are highly impacted by liquidity risk (roughly 44% of sovereign CDS spreads can be explained by liquidity risk, while 56% by default risk). In addition to these financial variables, real economic fundamentals have also been suggested by the empirical literature to be important determinants of sovereign risk premia (see, e.g., Hilscher and Nosbusch (2010)).

Some of the papers find evidence that the role of fundamentals may change over time. The paper by Beirne and Fratzscher (2012) suggests that economic fundamentals have a stronger role in influencing global financial markets during periods of stress than in tranquil times. The relative importance of economic fundamentals and financial variables may also differ, e.g., Longstaff et al. (2011) find that CDS spreads are more driven by financial market variables than by country specific macroeconomic fundamentals.

There is no common approach in extracting information about economic fundamentals relevant for CDS determination from available macroeconomic data. The task is inherently difficult for two reasons. First, CDS markets react to high frequency information while most economic data tend to be of lower frequency (monthly, quarterly or even annual). Second, investors in the CDS market base their decisions on expected future economic trends. Such information cannot be directly imputed from official statistics on past economic performance. Outturn of last year’s fiscal balance does not provide enough information to a forward looking investor, who is concerned about debt sustainability and sovereign risk over his or her investment horizon. Some papers (e.g. Arru et al., 2012) go around this problem by using news on macroeconomic announcements. Our approach is to use monthly average market forecasts of macroeconomic fundamentals (e.g. fiscal deficit, real GDP growth or current account balance). The advantage of this approach is that we can use forward looking measures of key explanatory variables with a higher frequency to model CDS spreads.

IV. Data

The data set covers 24 countries in Europe. They include 14 CESEE countries (Bulgaria, Croatia, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Romania, Russia, Slovak Republic, Slovenia, Turkey, and Ukraine)6, 5 euro area periphery countries (Greece, Italy, Ireland, Portugal and Spain), and 5 core euro area countries (Austria, Belgium, France, Germany, and Netherlands).7 Data spans from January 2007 to December 2012. An out of sample forecast for data between July 2012 and December 2012 is also conducted in Section VI using model estimated for the period of January 2007 to June 2012.

For the analysis of spillovers we use daily data, because prices adjust very quickly (often intra-day) in the CDS markets. In contrast, we use monthly data for the analysis of the effects of fundamentals on CDS spreads, since most of our fundamental variables are only available in a monthly frequency.

In the first half of our empirical investigation—the part on the role of spillovers—daily data on 5 year sovereign CDS spreads (from Bloomberg and Datastream) is used (roughly 1435 observations per country and 34440 observations all together). In addition, daily data on VIX is used as a measure of global risk aversion.

In the second half of the empirical analysis, the data set includes the following: monthly average of (daily) 5 year sovereign CDS spreads,8 (daily) bid-ask spread on CDS spreads, and (daily) VIX index. In addition, the data set includes monthly mean consensus forecasts from Consensus Economics, for the current year and one year ahead, of real GDP growth, general government balance (in percent of GDP), current account balance (in percent of GDP) for each country in the sample. For some countries, when consensus forecast on budget balances is not available, the latest forecasts from the IMF World Economic Outlook (WEO) database are used as a proxy for the market’s expectations.9 The public debt/GDP ratio for the previous year is added from the IMF WEO database as a conditioning variable.

V. The Role of Spillovers from the Euro Area Periphery

Spillovers between 24 European countries were analyzed using the generalized variance decomposition (GVD) methodology as suggested by Pesaran and Shin (1998). The generalized decomposition was applied to calculate directional, cross-border spillover indicators, similarly to Diebold and Yilmaz (2008) following a three step approach.

In the first step, a VAR system with one lag was estimated in an OLS framework, assuming that all markets in the system are endogenous (and including a common exogenous factor, a measure of general risk aversion, the VIX). We decided to use a VEC system instead of a simple VAR, because the CDS spreads tended to be I(1) processes as detected by the ADF and Philips-Peron tests, and the Johansen trace cointegration test revealed cointegration between the CDS spread series of the countries in our sample (see ANNEX I).10 The choice of one lag reflects the fact that CDS prices tend to react quickly to new pieces of information (usually even intra-day).

In the second step, the forecast error of a 10 day ahead forecast of the CDS spread series was calculated over a 160 day (roughly 8 months) rolling window. Selecting the length of the rolling window is subject to a tradeoff between the robustness of results and the timeliness of showing the changes of spillover effects over time. While a longer rolling window can contribute to a higher degree of robustness of the forecast results, it also decreases the responsiveness of the spillover measure to changes in the dynamics of the CDS spread series. While other papers (e.g. Alter and Beyer (2012)) use a shorter rolling window (i.e. 80 days), we decided to put a higher weight on accuracy by choosing a longer window. However, our robustness checks suggests that varying the length of the rolling window between 80 and 160 days had no impact on the paper’s main findings.

In the third step, we apply generalized variance decomposition of the covariance matrix of the 10 day ahead forecast error that allows us to calculate directional spillover indicators, attributable to various countries.

More formally, the basis of the variance decomposition is a VAR/VEC system. For the sake of simplicity we start with a simple N-variable VAR of p order to explain the composition of the spillover indices:

CDSt=Σp= 1PβiCDSt-p+εt(1)

where CDSt is a vector of N endogeneous variables (in our case the daily CDS spread series of 24 European countries). β, i=1,… p, are N*N parameter matrices, while εt is a vector of disturbances that are independently distributed over time.

The dynamics of the system can also be expressed in a moving average representation as follows:

CDSt=Σj=0Ajεt-j(2)

where the N*N coefficient matrices Aj are calculated recursively in the following way:

Aj=β1Aj-1+β2Aj-2++β2Aj-p(3)

Based on the above system, the generalized variance error decomposition of the H-step ahead forecast error is calculated as follows (similarly to Pesaran and Shin (1998)):

θij(H)=σjj-1Σh=0H-1(eiAhΣAhej)2Σh=0H-1(eiAhΣAhej)(4)

where ∑ represents the estimated covariance matrix of the error vector ε, σjj is the estimate of the standard deviation of the error term of the j-th equation, and ei is a selection vector with a value of 1 for the i-th element and zeros otherwise.

The matrix θij(H) above is an N*N matrix, where the main diagonal elements contain the idiosyncratic (own) contribution of a country to the forecast error of its own CDS spread forecast while the off-diagonal elements show the effect of country j on the forecast error variance of country i, representing cross-country spillovers.

Note that the cross-country variance contribution shares for a particular country do not add up to one under generalized decomposition, i.e. (Σj=1Nθij(H)1.) Therefore in the summary tables, for each country the variance decomposition is normalized by its row sum:

θ˜ij(H)=θij(H)Σj=1Nθij(H)*100(5)

where Σj=1Nθ˜ij(H)=1, by construction.

The results from the GVD analysis indicate that the direct spillover impact from CDS spreads in the euro area periphery countries (as a group) has not been the most dominant effect influencing CDS spreads in the CESEE region since 2007 (see Figure 5 and 6). The results show that for CESEE countries, the average share of shocks from the euro area periphery countries are generally much lower than that for advanced Europe (including Germany, Netherlands or Austria). It is noteworthy that during the euro area crisis (see Figure 6), for Ukraine, the country that experienced the highest levels of CDS spreads, the share of influence from spillovers in the CDS market from the euro area periphery countries is the lowest among CESEE countries.

Figure 5.
Figure 5.

The Percentage Share of Shocks from the Euro Area Periphery Countries in the Total Cross-Country Shocks Affecting the CDS Spreads of Each Countries, October 2008–March 2009

Citation: IMF Working Papers 2014, 017; 10.5089/9781484393017.001.A001

Sources: Datastream, Authors’ calculations, Note: for the euro area periphery countries the figure refers to spillovers from other euro area periphery countries.
Figure 6.
Figure 6.

The Percentage Share of Shocks from the Euro Area Periphery Countries in the Total Cross-Country Shocks Affecting the CDS Spreads of Each Country, May 2010–June 2012

Citation: IMF Working Papers 2014, 017; 10.5089/9781484393017.001.A001

Sources: Datastream, Authors’ calculations, Note: for the euro area periphery countries the figure refers to spillovers from other euro area periphery countries.

Results from the bilateral cross-country shocks show that none of the euro area periphery countries were among the most important sources of direct shock for any of the CESEE countries. Table 2 and 3 below show the bilateral spillovers between the 24 countries in two sub-periods, namely between October 2008 and March 2009 (the global crisis after the Lehman collapse) and between May 2010 and June 2012 (the euro area crisis up to June 2012). As elaborated below, direct cross-country influences within the region appeared to matter more for the CESEE countries in transmitting shocks, and the influence of euro area periphery is relatively weak.

Table 2.

The Distribution of Cross-Country Shocks to CDS Spread Forecast Error Variance in Selected CESEE and Euro Area Countries Between October 2008 and March 2009

article image
Sources: Datastream, author’s calculation.Note: Each column adds up to 100, representing the total cross-country spillovers from the rest of the countries in our sample. The shaded areas in the table show the highest quartile cross-country influence on a given country.
Table 3.

The Distribution of Cross-Country Shocks to CDS Spread Forecast Error Variance in Selected CESEE and Euro Area Countries between May 2010 and June 2012

article image
Sources: Datastream, author’s calculation.Note: Each column adds up to 100, representing the total cross-country spillovers from the rest of the countries in our sample. The shaded areas in the table show the highest quartile cross-country influence on a given country.

It is striking that for both the euro area and the CESEE countries, intra-regional shocks were the dominant cross-country influences during the 2008–09 global crisis (see Table 2). Among the euro area countries, euro area periphery countries generated the strongest shocks. In particular Ireland was a main source of impulses for all core euro area countries, except Italy. This may reflect the fact that during the 2008–09 crisis, investors were primarily concerned with banking sector problems and Ireland was one of the countries most drastically affected by such problems. To the CESEE countries, Ireland only had a strong impact on CDS spreads in Slovenia, which shows that at this point, Slovenia was already a euro area country (at the same time it is hard to see any other link between the two countries). The CESEE countries, on the other hand, have been largely influenced by shocks from other CESEE countries. In particular, Hungary and to a smaller extent, the Baltic countries and Romania stand out as the main sources of shocks on the CDS spreads of other CESEE countries. This is not entirely surprising. Hungary, the Baltics, and Romania were in the first group of countries affected by the sudden stop of capital flows phenomenon during the 2008–09 crisis and some of these countries needed substantial external assistance to avoid a deeper crisis.11 A confidence shock among investors emerged and spread as the sustainability of the hard pegs in the Baltic States were questioned and the economic booms turned into busts in many countries in the region. At the same time, Russia, the largest economy of the region, has seen the effect of a marked decline in oil prices along with a rapid decline of its foreign exchange reserves.

During the euro area crisis, euro area countries have been still most strongly affected by cross-country spillovers from other euro area countries. However, Ireland was replaced by Spain and Italy as the main sources of cross-country spillovers (see Table 2). In contrast, Greece itself has not been among the major direct influences on CDS spreads of other countries. This may reflect the fact that investor concerns about debt sustainability in Spain and Italy were linked much more to concerns about the future of the euro area as a whole given the size of the two economies and their stronger ties to the core euro area countries compared to Greece. Moreover, following the first Greek debt restructuring in mid-2011, Greek CDS spread was persistently well above 1000 bps and probably carried little information for investors. Shocks from the CESEE countries towards the euro area were not among the major shocks for the euro area countries.12

The CESEE countries continued to be mainly affected by shocks within the region during the euro area crisis as well. The most pronounced shock impulses appeared to have come from Hungary and to a smaller extent, Romania and Bulgaria, while the role of the Baltic countries as shock generators diminished. From the euro area periphery countries, Italy and Spain had the largest impact on the CESEE countries but these shocks were not among the top quartile influences in any of the countries in CESEE with the exception of Croatia, a country with relatively strong economic ties (through trade and the financial sector) to Italy.

The variation of CDS spreads of CESEE countries has been substantially lower during the euro area crisis than at the peak of the previous crisis (see Table 4), but it has started to increase gradually following the escalation of the crisis in mid-2011. While in March 2009, the standard deviation of CDS spreads across the countries in the CESEE region was at 963bps, it has dropped to 102bps by July 2011! However, markets seem to have gradually started to differentiate more again between countries within the region following the escalation of the euro area crisis in the summer of 2011 (see Annex II). In particular, Ukraine and Hungary (with CDS spreads at 861bps and 557bps, respectively in June 2012) remained among the countries with the highest CDS spreads in the EU (excluding Greece). Slovenia’s story is also noteworthy. During the 2008-09 global crisis, Slovenia was hardly affected by the crisis with the lowest CDS spread in the region, it was considered by investors a “safe” euro area country. This has been largely reversed by 2012, when Slovenia’s CDS spread has been rising rapidly, surpassing the levels of CDS spreads in most other countries in the region. The Baltic countries stand on the other end of the spectrum. While in March 2009, all of them were among the countries with the highest CDS spreads, by June 2012 the CDS spreads of all of these countries are comfortably below that of any of the euro area periphery countries (ranging between 111bps in Estonia and 251bps in Latvia).

Table 4.

Simple Measures of Cross-Country Variation of CDS spreads in the CESEE Region

article image
Source: Datastream

The GVD results seem to confirm that country specific shocks explain a great deal of the increase in divergence of the CDS spreads in the region between mid-2011 and mid-2012. Figure 7 illustrates the story of three CESEE countries, Latvia, Hungary and Slovenia. In early 2010, before the euro area crisis, country specific shocks explained a very high share of CDS spread variance (between 30-45% of total variance) in Latvia, while in Hungary and Slovenia, own country shocks accounted for only between 5 to 10% of the total variation. Afterwards, the share of own shocks in Latvia came down massively and by June 2012 it has only been around 10% of the total shocks. In contrast, in the case of Hungary, the share of own country shocks have been on the rise since May 2010. This was most likely the result of investor concerns about the growth impact of the series of a series of unorthodox policy measures implemented by the government. In Slovenia, an even more pronounced increase in own country shocks have taken place since the end of 2011, which most likely reflected the emergence of fiscal and banking sector problems in that period.

Figure 7.
Figure 7.

The Percentage Share of Idiosyncratic Shocks in the Total Forecast Error Decomposition of Selected CESEE Countries

Citation: IMF Working Papers 2014, 017; 10.5089/9781484393017.001.A001

Sources: Datastream, Authors’ calculations

VI. The Role of Fundamentals in Explaining Sovereign CDS Spreads

We continue with the analysis of the role of country specific factors by expanding the data set to include a series of explanatory variables, and then investigate how these variables together may explain sovereign CDS spreads for individual countries.

A. Explanatory Variables

The list of economic and financial factors that can potentially affect CDS spreads can be fairly long. As noted earlier (Section III), we focus on three groups of variables for our analysis following the large body of theoretical and empirical work in this area. They include: (1) global investor sentiment as proxied by the VIX13; (2) liquidity conditions in the CDS market, as proxied by the bid-ask spread of CDS prices; and (3) Macroeconomic fundamentals. In the last group, we mainly include forecast variables that reflect investor perception of public debt sustainability and the economic strength of the country. They are: GDP growth forecast (for current year and the following year), forecast of fiscal deficit (for current year and the following year), forecast of current account balance (current year) and previous year’s public debt to GDP ratio (the initial debt level).

The use of VIX index as a measure of global risk aversion is fairly common in the literature (among others see in Arghyrou and Kontonikas (2010), Arce, Mayordomo, Pena (2012), Hauner et al (2010), J. Beirne, M. Fratzscher (2013), Hilscher and Nosbusch (2010), Pan and Singleton (2008)). Besides the VIX a number of other measures are used to proxy global risk aversion. De Santis (2012) for instance uses US corporate bond spreads (the difference between US triple-B corporate bond and US treasury yield at the same maturity) as an alternative measure. However as suggested by Barrios et al. (2009) such indicators tend to be highly correlated14. As a robustness check to our estimation we have also employed the European version of VIX, the VSTOXX index.

In order to assess the effect of liquidity we use bid-ask spreads of CDS spreads like a large number of earlier papers that use CDS or bond specific bid ask spreads (e.g. De Nicolo, Ivaschenko (2008), Barrios et al. (2009), Arce, Mayordomo, Pena (2012), and De Santis (2012)). Theoretical justification is that the bid ask-spread is influenced by the depth of the market. A deep and liquid market is usually associated with low bid-ask spread.

The use of monthly frequency mean Consensus Forecasts offer several advantages compared to earlier studies relying on low frequency fiscal indicators (e.g. quarterly real GDP growth figures or biannual Eurostat releases on the fiscal deficit GDP ratio for the previous year as in De Santis (2012)). First, these variables are key determinants of the default risk of sovereign debt, and expected to have a significant impact on the pricing of CDS contracts. For example, public debt sustainability is highly dependent on a country’s growth prospects, health of current and future public finances. For those countries which either have high external holdings of sovereign debt, or have sovereign debt denominated or linked to foreign currency, external sustainability as proxied by the current account balance is also an important indicator of the riskiness of sovereign debt. Second, with their forwarding look nature, these market forecasts should closely resemble the information set investors likely to possess in real time. Third, the higher (monthly) frequency of these data provides more information compared to official statistical releases that are usually available at lower frequencies like quarterly or annually and do not convey much forward looking information.

B. Estimation Methodology

CDS spreads are modeled as following an error-correction process. First, CDS spreads track a “norm” level that is determined by the explanatory variables:

CDSt=α+Xtβ+εt(6.1)

CDSt*=α+Xtβ, the “CDS norm” denotes the level of CDS spread that would materialize in the absence of any short term friction, while Xt includes the explanatory variables. The deviation from such norm is expected to be corrected in the subsequent periods. The change in CDS spreads is driven by three factors: persistence of change in the previous periods, innovation of X in the current period, and the force of error correction from previous periods. In other words, the short-term dynamics of CDS spreads is described as follows:

ΔCDSt=θ1ΔCDSt-1++ΔXtρ+γ1(CDSt-1-CDSt-1*)++μt(6.2)

The estimation follows an approach that is first proposed by Engel and Granger (1997), and proceeds in two steps. In the first step, the estimation of (6.1) is done using panel generalized least-square (GLS) method that corrects for the heterogeneity of across sample errors (with country dummies15). The advantage of GLS is that GLS coefficient estimates are compatible with the data being either stationary or non-stationary (but cointegrated). Our data set consists of both stationary and non-stationary series. In the second step, after obtaining estimates of (6.1), the estimation of (6.2) is done by using the panel dynamic estimation technique proposed by Arellano and Bond (1991) which is a GMM technique that corrects for any endogeneity arising from the presence of lagged dependent variables. An additional reason for using a GMM approach is to deal with potential feedback effects between CDS spreads and fiscal forecasts.16 While fiscal forecasts are expected to influence sovereign risk and CDS spreads, an external shock to CDS spreads may also have an impact on the market’s perception of future borrowing costs and fiscal stance.

We separate the estimation sample into two periods, namely the period before and after the start of the euro area crisis (with a time dummy from May 2010 for the euro area crisis episode) similar to the analysis in Section IV. We use a modified approach suggested in Chen (2012) and Chen (2009) to reduce the degree of multi-collinearity among the explanatory variables in the estimation of (6.1).17 This approach, can consistently estimate the true model in the presence of severe multi-collinearity. For our data, given the large correlation among the growth, fiscal deficit, and current account deficit, and correlation between VIX and bid-ask spread, these concerns are not trivial.

Table 5.

Correlation of Main Variables

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Source: Bloomberg, Consensus Forecast, and WEO.* p<0.05, ** p<0.01, *** p<0.001

C. Estimation Results

The estimation results for equation (6.1) are shown in Table 6. The results suggest that the model is adequately specified and the coefficients and fit properties are generally satisfactory. They yield many interesting insights that we explain below.

Table 6.

CDS Spreads: Estimation the Norm (with Country Dummies)

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Note: Standard errors in parentheses. Country dummies and their interaction terms between the crisis dummy and the explanatory variables are not shown. Data limited to episodes where CDS was below 1000.*** p<0.01, ** p<0.05, * p<0.1Data source: Bloomberg, Consensus Forecast, and WEO.*variables adjusted for colinearity with other variables.

Global risk aversion

Global investor risk appetite has a clear affect on individual CDS spreads. For the euro area crisis period, a 1 percent increase in the VIX would raise CDS spreads by about 5.4 bps compared to 4.6 bps before the euro crisis.

Liquidity

There is evidence of a liquidity impact18, the extent of which appears to change over time. An increase in the bid-ask spread by one bps would increase the CDS spread by 6 bps for the euro area crisis period (5.6 bps before the euro area crisis). Countries with less liquid markets tend to be penalized and suffer from a larger increase in their CDS spreads especially in stress periods. The larger impact of liquidity in the pre-euro area crisis period likely to reflect mainly the fact that the first part of our sample period included the 2008/09 crisis, when a global liquidity shock hit all markets simultaneously (see Annex III, that shows the evolution of bid-ask spreads of sovereign CDS spreads for selected European countries). The extent of the effect of this common shock differed greatly across countries. However, afterwards, during the euro area crisis there has not been a similar shock in global liquidity and the cross-country variation of CDS spreads remained much lower, even in periods of global rising risk aversion. This pattern over time is also broadly in line with Bai, Julliard and Yuan (2012) who found that during the crises episodes in recent years initially liquidity concerns were driving CDS spreads in the euro area, but from late 2009 sovereign spreads were mainly credit risk driven.

Can it be that the observed impact of bid-ask spreads are simply an indirect impact of risk aversion? There is indeed correlation between the VIX and bid-ask spreads, but for the sample as a whole the correlation coefficient is only around 0.2. As discussed before we addressed this issue with coefficients adjusted for multicollinearity. A large share of the correlation reflects the 2008/09 crisis when a global confidence shock was combined with a liquidity squeeze in financial markets that hit all markets simultaneously, while bid-ask spread developments followed much less changes in risk aversion afterwards.

Macroeconomic fundamentals

In addition to the above factors our findings suggest that country specific macroeconomic fundamentals do matter. In particular fiscal fundamentals and growth prospects appear to have had a strong impact on CDS spread levels and dynamics. Both sets of factors tend to have a high impact on sovereign credit risk.

Growth prospects matter a great deal. Forecasts of higher growth will significantly reduce CDS spreads. For the euro area crisis period, one percentage point higher GDP growth forecast for the next year reduces CDS spreads by 32 bps (compared to 42 bps before the euro crisis). Current year GDP growth forecast has a statistically insignificant impact during the euro crisis (and 12 bps before the euro crisis).19

There is also some evidence that different vulnerabilities may reinforce each other’s impact on the level of CDS spreads. Growth prospects are even more relevant for high debt countries. For countries with high public debt (above 80 percent of GDP), high average growth for the current year and next will have an additional impact of 20 bps on CDS spread during the euro crisis (12 bps before the crisis) for every change of one percentage point in growth.

During the euro area crisis, countries that have very low growth prospects are viewed more harshly by the market. During the euro crisis, countries whose average two year growth are below 0.05 percent (for advanced euro area countries) or one percent (for CESEE countries) would see on average 66 bps increase in CDS spreads. In contrast, being an ultra-low growth country has a smaller impact on the CDS spreads (14 bps) before the euro crisis.

Future fiscal consolidation effort has a fairly large effect on CDS spreads. A one percentage point increase in the fiscal deficit forecast for the next year raises CDS spreads by 16 bps during the euro crisis period (compared to 2.6 bps before the euro crisis). This result suggests that, especially during the euro crisis, market’s perception of future fiscal consolidation path has a significant bearing on CDS spreads.

Current period fiscal deficit is relevant for high debt countries. For high debt countries (with debt level above 80 percent of GDP), a one percentage point increase in the current year fiscal deficit forecast will raise CDS spread by 13 bps (as opposed to about 20 bps before the crisis).

As alluded earlier, high level of public debt raises CDS spreads. The regression suggest that the norm CDS spreads for countries with debt exceeding 80 percent of GDP will be higher by 105 bps during the euro crisis (181 bps before the crisis) compared to other countries, not counting the additional impact via the interaction term with the current year fiscal deficit forecast.

Market behavior seemed to have changed during the euro area crisis period. For example, as noted above, markets put a much bigger weight on future growth and fiscal consolidation efforts, and viewed those countries with extremely low growth prospects much more negatively. As another example, in the current euro area crisis period, euro area sovereign bonds have been viewed in a much harsher way: the discount on euro area CDS spreads is statistically insignificant compared to CESEE bonds, while before the euro crisis, they have enjoyed a 217 bps discount. A formal test of structural break of equation (6.1) à la Chow (1960) shows that indeed these differences are statistically significant (see Table 7). In contrast, the role of current period growth and bid-ask spread has not changed significantly; and although statistically significant, the impact of VIX increased only marginally (less than 2 bps).

Table 7.

CDS Spreads: Structural Break Test Results

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Note: Standard errors in parentheses. Country dummies and their interaction terms with the crisis dummy are not shown. Data limited to episodes where CDS was below 1000.*** p<0.01, **p<0.05, *p<0.1Data source: Bloomberg, Consensus Forecast, and WEO.*variables adjusted for colinearity with other variables.

Estimation of the dynamic properties of change in CDS spreads as specified in equation (6.2) provide additional insights on forces that affect contemporaneous movement in CDS spreads. Estimation results of (6.2) based on (6.1) are presented in Tables 8a and 8b.

Table 8a.

Estimation Results for Equation (6.2), Various Specification for the Euro Crisis Period

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Note: Robust standard errors in parentheses.*** p<0.01, ** p <0.05, * p <0.1Data source: Bloomberg, Consensus Forecast, and WEO.