Mumbai, Nov. 13 -- The flat movement returned to Indian stock markets on Thursday after both benchmark indices witnessed an upside movement on Wednesday.

Investors remained cautious as markets awaited updates on the potential U.S.-India trade deal and the outcome of the Bihar elections, with counting scheduled for Friday.

The Nifty 50 index was trading at 25,880.30 with a modest gain of 4.50 points or 0.02 per cent, while the BSE Sensex opened at 84,468.59 with a flat gain of just 2.08 points.

Experts noted that the market sentiment is currently driven by expectations of any positive developments, and a favourable trade deal outcome could trigger an upside move in the indices.

In the broader market indices, all segments were trading i...