The key benchmark indices were trading flat in the morning deals today. The Sensex rose 48 points to 14,833 and the Nifty gained 13 points to trade at 4,401.

Some buying interest was seen in realty, auto and banking stocks. The BSE realty index surged 1.2 per cent and the auto index rose 1 per cent. The banking index on the BSE was up 0.7 per cent.

In the Sensex pack, Hero Honda was the biggest gainer. The stock rose 1.6 per cent. Sterlite, JP Associates, Maruti Suzuki and Hindalco were up over 1per cent each.

Grasim Ind, however, was trading 1.8 per cent lower.

Major US stocks indexes tumbled by the biggest amount in six weeks on Monday as investors grew worried that they have been too quick to bet on an economic rebound during the market's five-month rally.

The Dow fell 186.06, or 2 percent, to 9,135.34, its lowest close since July 29.

The broader S&P 500 index, which is the basis for many investments like mutual funds, fell 24.36, or 2.4 percent, to 979.73.

The Nasdaq fell 54.68, or 2.8 percent, to 1,930.84, its biggest drop since June 22.

Asian markets also fell today led by a decline in commodity stocks. Chinas Shanghai Composite shed 1 per cent and Hong Kong's Hang Seng was down 0.3 per cent.