The BSE Sensex index opened 590 points lower at 75,444.22 on Friday, and the Nifty 50 index opened at 23,462.50, which is nearly 177 points lower than the previous day's close. On Thursday, the Sensex closed 829 points lower, and the Nifty 50 index closed 228 points lower. The Indian markets are bearing the brunt of the Middle East war.