Crude rises to $97 after steep drop

SINGAPORE (Reuters) - Crude rose to just over $97 a barrel on Tuesday, regaining some ground after falling as much as $4 in the previous session in a late, high-volume sell-off that has prompted an investigation by U.S. regulators. The Commodity Futures Trading Commission said it was "looking into" the price plunge that also shaved over $5 off Brent crude futures, and has contacted exchange