The Sensex and Nifty pared their initial gains as traders waited on a Federal Reserve meeting for clues on US monetary policy.

The Fed is set on Wednesday to announce the start of a plan to trim its $4.5-trillion portfolio of assets, much of it amassed in response to the 2007-2009 financial collapse, marking another milestone in bringing to an end the crisis-era measures.

At 9.55 a.m., the 30-share BSE index Sensex was down 15.06 points or 0.05 per cent at 32,408.70 and the 50-share NSE index Nifty was down 8.85 points or 0.09 per cent at 10,144.25.

Among BSE sectoral indices, power index was down 0.45 per cent, followed by capital goods 0.34 per cent, infrastructure 0.31 per cent and metal 0.23 per cent. On the other hand, oil & gas index gained 0.75 per cent, followed by auto 0.58 per cent, healthcare 0.24 per cent and TECk 0.16 per cent.

Top five Sensex gainers were Tata Motors (+4.6%), Wipro (+0.52%), Infosys (+0.45%), HDFC Bank (+0.36%) and Sun Pharma (+0.33%), while the major losers were Dr Reddy's (-1.14%), Coal India (-1.08%), PowerGrid (-0.86%), L&T (-0.82%) and Cipla (-0.81%).

Asian shares wavered on Tuesday, bolstered by record highs on Wall Street, but hobbled by uncertainty as traders waited on a Federal Reserve meeting for clues on US monetary policy.

MSCI’s broadest index of Asia–Pacific shares outside Japan turned slightly higher after dipping into negative territory.

On Wall Street on Monday, the Dow Jones Industrial Average closed at a record high for the fifth straight session and the S&P 500 marked its second straight closing record high, as higher US Treasury yields helped lift financial shares.