Hot water

American Express is facing an enforcement action by the Federal Deposit Insurance Corp. and possibly the Consumer Financial Protection Bureau over late fees the company charged some charge-card customers.

In orbit

Orbitz Worldwide rose 11.6 percent to $3.46 after Jefferies & Co. raised its price target and 2012 earnings estimate for the online travel agent.

Tweet no!

Biz Stone, one of Twitter’s co-founders, has warned the micro-blogging site’s estimated 500 million users that spending too much time on it is “unhealthy.”

BofA bias suit

African-American brokers who accused Bank of America’s Merrill Lynch unit of bias can pursue their lawsuit in a class action, a federal appeals court in Chicago said, reversing a lower-court ruling.

Energized

A group led by Apollo Global Management agreed to acquire El Paso’s oil and natural gas exploration business for $7.15 billion in the second-biggest private-equity takeover of an energy producer.