The S&P BSE Sensex and NSE Nifty 50 indexes fell for third session in a row on Monday on the back of a broad-based selloff. Investors turned cautious considering surging COVID-19 cases across the country and the passage of a contentious farm bill by lawmakers in the upper house of parliament yesterday, according to analysts. Weak trading in European equity markets also added to the already negative sentiment on Dalal Street. The Sensex fell as much as 907 points to hit an intraday low of 37,938 and the broader NSE Nifty 50 dropped below its important psychological level of 11,250.