The parent company of the New York Mercantile Exchange , which trades in energy and commodity futures, filed preliminary plans for a public offering.

ECONOMIST: Business this week

Investor cans bypass both company risk and commodities futures trading costs by purchasing U.S. Oil, an exchange-traded fund that tracks the price of oil futures.

FORBES: Oil: How Low Can It Go?

Consider for example the recent decision of the Securities and Futures Commission of Hong Kong to allow shares of the United Company RUSAL to be listed on the Hong Kong Stock Exchange.

FORBES: Do Inefficient Stock Markets Drive Bad Corporate Governance?