Sensex ends flat in volatile trade

MUMBAI (Reuters) - Indian stocks ended flat in a volatile session on Wednesday as investors avoided risky bets ahead of the expiry of January derivatives contracts on Thursday and a U.S. Federal Reserve policy statement due later in the day.

The broader Nifty gained marginally to end 0.02 percent higher while the benchmark Sensex rose 0.03 percent at close.

(Reporting by Karen Rebelo in Mumbai; Editing by Biju Dwarakanath)