Risk Premiums and Efficiency in the Market for Crude Oil Futures*

The New York Mercantile Exchange's Crude Oil futures contract is investigated for the existence and nature of risk premiums and informational efficiency. During 1983-90, there is some evidence that short-term premiums were positive and covaried with recent volatility. As for efficiency, we find nothing inconsistent with weak-form efficiency, but some apparent violations cf semi-strong efficiency. We argue that, for a number of reasons, such rejections should be interpreted with caution.