How much does speculation contribute to oil price volatility? We revisit this contentious question by estimating a sign-restricted structural vector autoregression (SVAR). First, using a simple storage model, we show that revisions to expectations regarding oil market fundamentals and the effect of mispricing in oil derivative markets can be observationally equivalent in a SVAR model of the world oil market à la Kilian and Murphy (2013), since both imply a positive co-movement of oil prices and inventories. Second, we impose additional restrictions on the set of admissible models embodying the assumption that the impact from noise trading shocks in oil derivative markets is temporary. Our additional restrictions effectively put a bound on the contribution of speculation to short-term oil price volatility (lying between 3 and 22 percent). This estimated short-run impact is smaller than that of flow demand shocks but possibly larger than that of flow supply shocks.
This paper discusses fiscal surveillance criteria for the countries of the Central African Monetary and Economic Union (CEMAC), most of which depend heavily on oil exports. At present, the CEMAC's macroeconomic surveillance exercise sets as fiscal target a floor on the basic budgetary balance. This appears inadequate, for at least two reasons. First, fluctuations in oil prices and, hence, oil receipts obscure the underlying fiscal stance. Second, oil resources are limited, which suggests that some of today's oil receipts should be saved to finance future consumption. The paper develops easy-to-calculate indicators that take both aspects into account. A retrospective analysis based on these alternative indicators reveals that in recent years, the CEMAC's surveillance exercise has tended to accommodate stances of fiscal policy that are at odds with sound management of oil wealth.