Indian stock markets crashed today, after a sharp rally in the previous session, as early vote-counting trends showed Prime Minister Narendra Modi's Bharatiya Janata Party-led alliance leading in more than 272 seats, but the extent of the victory was not clear. The NSE Nifty 50 index was down 3.03 per cent 22,557 as of 9.30 am, and the S&P BSE Sensex fell 3 per cent to 74,107.