Stock market today, June 18 -- The Indian stock market extended its gains for a fourth straight session on Wednesday, supported by growing optimism over a potential US-Iran peace agreement and a decline in crude oil prices.

The benchmark Sensex advanced 347.14 points, or 0.45%, to end the day at 77,155.62, while the Nifty 50 climbed 96.55 points, or 0.40%, to close at 24,085.70.

However, the market is likely to open on a flat note as trends in the Gift Nifty index signalled a muted opening on Thursday, 18 June. Gift Nifty was trading near the 24,083 mark, down over 11 points from the previous close of Nifty futures.

"Indian markets are expected to trade with a cautiously positive bias, supported by encouraging developments on both the ...