The S&P BSE Sensex and NSE Nifty 50 indexes fell for third day in a row as financial and banking sector shares like HDFC, HDFC Bank, Bajaj Finance, Bajaj Finserv, Kotak Mahindra Bank and State Bank of India came under selling pressure after the country's largest private sector lender on Saturday said that its bad loans rose in April-June quarter. The benchmarks opened on a weak note and extended losses with the Sensex falling as much as 447 points and the NSE Nifty 50 index touching intraday low of 11,300. The benchmarks fell to their lowest since mid-May on Monday.