These are challenging times for emerging markets. China's economy is expanding at the slowest pace in more than a decade, and annual growth in once-booming nations like Brazil, Mexico, Russia, and South Africa has slowed to about 1.5 to 2.5 percent. Look around the developing world, and currencies are weakening, worries about asset bubbles and rising debt are mounting, and foreign direct investment has fallen sharply. This volatility leaves many companies wondering if they are overexposed to the risks of emerging markets.

When TransCanada first proposed the Keystone XL pipeline in 2008, the company hoped it would be done by 2012 and begin carrying heavy crude from the Alberta oil sands in Western Canada down to the U.S. Gulf Coast. Six years later the pipeline remains in limbo, stymied by Department of State reviews, route adjustments, lawsuits, environmental and economic studies, and (most important) an Obama administration that appears truly divided on the issue. Last month the State Department announced that no decision would come until after November's midterm elections.