RBI Governor Raghuram Rajan also said on Thursday central banks risk sparking new crises by keeping their loose policy in place for too long.
Investors were cautious ahead of the June quarter current account deficit numbers due on Monday. India's current account deficit is expected to rise from the previous three-month period before easing due to a sharp fall in gold imports and improving exports.
Analysts said the market was precariously poised with its attention divided between weak macro data points and Infosys Ltd's results, due on October 11.
"Markets will remain lacklustre in the absence of positive triggers and I am bracing for the earnings season, but with a negative bias," said Sudip Bandyopadhyay, managing director of Destimoney Securities Pvt Ltd.
The benchmark BSE index fell 0.84 per cent, or 166.58 points, to end at 19,727.27, also falling 2.6 per cent for the week, marking its first weekly fall in five.
Nifty declined 0.83 per cent, or 49.05 points, to end at 5,833.20, also falling 3 per cent for the week, closing below its 200-day moving average for the first time since September 6.
ICICI Bank Ltd fell 2.4 per cent, while HDFC Bank Ltd lost 2 per cent.
Also, ratings agency Fitch said non-performing loans at Indian banks are expected to peak as late as March 2016, compared with its earlier estimate of the middle of current fiscal year that started in April.
Among state-owned banks, State Bank of India Ltd fell 2.1 per cent, while Bank of Baroda Ltd ended 1.6 per cent lower.
In non-banking lenders, Housing Development Finance Corp Ltd fell 1.1 per cent while LIC Housing Finance Ltd ended 2.9 per cent lower.
Dr.Reddy's Laboratories Ltd ended 1.8 per cent lower on profit-taking after hitting an all-time high of Rs 2,474.40 on Thursday.
Among the gainers, Bharat Petroleum Corp Ltd surged 6.3 per cent and Videocon Industries rose 5.4 per cent after their partner Petrobras determined that a well off Brazil's northeastern coast likely holds more than a billion barrels of oil.
Sun Pharmaceutical Industries Ltd gained 1.5 per cent after earlier touching an all-time high of Rs 597.50 on expectations of higher sales of its key cancer drug.
Copyright: Thomson Reuters 2013