When stock markets are less liquid or illiquid, investors are expected to require compensation for taking the risk of not being able to sell quickly. Many studies have documented the existence of the co-movements (commonality) of market liquidity in equity markets as a priced factor. The primary...

The present paper offers a short history of the Organization of Petroleum Exporting Countries (OPEC) together with a brief account of its goals, operational structure, membership requirements and its role in regulating oil prices. Studying oil price developments and OPEC's role since its...