Check out which companies are making headlines before the bell on Friday:
Groupon stock jumped after legendary investor Bill Miller said he likes the stock. Miller said Groupon has $1.2 billion in cash, no debt, and is cheap. Miller likes the "low expectations" and said his average cost is about $5. "I'm more attracted to the stuff that has warts on it," he said. Miller also likes Apple, Texas Instruments, and US Airways.
Carnival - Carnival will issue quarterly earnings at 9:15 a.m. ET, and is expected to comment on its recent cruise ship mishaps during a subsequent conference call. On Thursday, the Carnival Dream had to end a cruise in St. Maarten because of various technical problems, and the Carnival Legend is having propulsion problems which will cause it to miss a scheduled stop because it's unable to travel at its usual speed.
JPMorgan Chase, Goldman Sachs - The Federal Reserve said the two banking giants need better capital plans, and gave the banks until September to revise them. That follows the release of the central bank's stress tests. Among those whose capital plans were approved: Citigroup, Wells Fargo, Morgan Stanley, and Bank of America, while BB&T and Ally Financial did not pass.