Market benchmark BSE Sensex were trading down by nearly 80 points on sustained profit-booking by investors after recent gains.

Besides, a weak trend in other Asian bourses after a broad global rally, weighed on the trading sentiment here.

At 11 a.m., the 30-share BSE index Sensex was down 76.3 points or 0.26 per cent at 28,763.49 and the 50-share NSE index Nifty was down 27.05 points or 0.3 per cent at 8,872.70.

Among BSE sectoral indices, FMCG index fell the most by 0.75 per cent, IT 0.44 per cent, banking 0.39 per cent and capital goods 0.37 per cent. On the other hand, realty index was up 0.82 per cent, oil & gas 0.64 per cent, healthcare 0.32 per cent and power 0.3 per cent.

Top five Sensex gainers were Reliance (+2.67%), GAIL (+1.42%), Sun Pharma (+0.73%), Axis Bank (+0.61%) and Dr Reddy's (+0.55%), while the major losers were HDFC (-1.57%), Asian Paints (-1.56%), ITC (-1.53%), Infosys (-0.86%) and Bajaj Auto (-0.75%).

The dollar held broad gains on Friday as the risk of an imminent US interest rate hike slugged sovereign bonds and commodities, even managing to sour Wall Street's party as the reality of rising borrowing costs began to sink in.

Asian stock markets were mostly lower, with MSCI's broadest index of Asia-Pacific shares outside Japan off 0.9 per cent in the biggest daily drop so far this year.

US stocks retreated on Thursday, led by financial stocks, while Caterpillar shares dropped following news that federal officials searched its Illinois facilities.

Caterpillar, down 4.3 per cent at $94.36, was the biggest drag on the Dow and among the biggest negatives for the S&P 500. In a statement issued after the closing bell, Caterpillar said the search may be related to an Internal Revenue Service investigation on profits earned by a Swiss subsidiary.