The sensex opened strong with a 400-point gain, and soon rallied to an all-time peak of 40,125. But from then on, as profit-booking set in, it lost ground. In the last hour of trade, it fell sharply to touch an intra-day low at 38,652, but closed a bit higher from that level.

from Times of India https://timesofindia.indiatimes.com/business/india-business/sensex-hits-40k-after-narendra-modi-win-but-ends-in-the-red-on-fears-of-co-earnings-liquidity-woes/articleshow/69472897.cms