Stock market today: BSE Sensex and Nifty50, the Indian equity benchmark indices, opened in red on Wednesday. While BSE Sensex was below 81,700, Nifty50 was just above 25,000.Stock market today: BSE Sensex and Nifty50, the Indian equity benchmark indices, opened in red on Wednesday. While BSE Sensex was below 81,700, Nifty50 was just above 25,000.