Indian benchmark indices opened higher on Wednesday amid buying in index heavyweights Tata Steel, Dish TV, Vodafone Idea, JSPL and Indiabulls Housing.

Investors will be eyeing US Fed's monetary policy decision due later in the day, crude oil prices, UK election (starts Thursday) and US-China trade talks for cues today. After slashing interest rates thrice this year, the Federal Reserve is widely expected to keep the interest rates unchanged this time at 1.50-1.75 per cent.

At 9:35 hours, the 30-share benchmark index was trading at 40347.77 up by 107.89 points or by 0.27 % and then NSE Nifty was at 11875.6 up by 18.8 points or by 0.16 %.

Sensex touched intraday high of 40357.64 and intraday low of 40135.37 The NSE Nifty touched intraday high of 11888.15 and intraday low of 11867.35

The top gainers of the BSE Sensex pack were Tata Consultancy Services Ltd. (Rs. 2039.80,+1.36%), Mahindra & Mahindra Ltd. (Rs. 755.00,+1.31%), Infosys Ltd. (Rs. 720.90,+0.93%), ITC Ltd. (Rs. 237.40,+0.85%), HCL Technologies Ltd. (Rs. 548.50,+0.77%), among others.

The top losers of the BSE Sensex pack were YES Bank Ltd. (Rs. 47.15,-6.73%), Hero MotoCorp Ltd. (Rs. 2308.35,-0.95%), Hindustan Unilever Ltd. (Rs. 2007.85,-0.85%), Power Grid Corporation of India Ltd. (Rs. 181.25,-0.82%), State Bank of India (Rs. 311.55,-0.61%), among others.

Among the sectors, _IT index was at 14985.99 up by 143.08 points or by 0.96%. 63 Moons Technologies Ltd. (Rs. 103.20,+2.38%), AXISCADES Engineering Technologies Ltd. (Rs. 52.00,+2.16%), NIIT Technologies Ltd. (Rs. 1456.25,+1.39%), Tata Consultancy Services Ltd. (Rs. 2039.80,+1.36%), Mahindra & Mahindra Ltd. (Rs. 755.00,+1.31%),.

On the flip side, CGS index was at 16628.99 down by -66.54 points or by -0.4%. Sadbhav Engineering Ltd. (Rs. 118.10,-3.79%), V-Guard Industries Ltd. (Rs. 207.50,-2.24%), Havells India Ltd. (Rs. 640.55,-1.14%), Honeywell Automation India Ltd. (Rs. 25300.00,-0.66%), Larsen & Toubro Ltd. (Rs. 1272.00,-0.56%),.

The Market breadth, indicating the overall strength of the market, was weak. On BSE out of total shares traded 1335 , shares advanced were 670 while 576 shares declined and 89 were unchanged.