Mumbai, Feb. 1 -- Domestic stock markets opened largely flat on Sunday during a special budget session, as Union Finance Minister Nirmala Sitharaman is set to present her ninth consecutive Union Budget at 11 am.

The Nifty 50 index opened at 25,333.75, registering a marginal gain of 13.10 points or 0.05 per cent, while the BSE Sensex opened at 82,445.97, up by 176.19 points or 0.21 per cent.

This marks only the second time in the history of Indian stock markets that trading is taking place on a weekend for a special budget session. Earlier, markets were opened on a weekend in 1999, when the Union Budget was presented on February 27, a Saturday.

Market expert Ajay Bagga said expectations from the Budget remain subdued. Speaking to ANI, B...