Meanwhile, the 50-share Nifty lost 14.25 points, or 0.28 per cent to 5,054.10, after touching the day's high of 5,124.45.
On April 25, Standard & Poor's affirmed its 'BBB-' long-term sovereign credit rating on India but revised the outlook on the rating to negative from stable.
The outlook revision reflected at least a one-in-three chance of a downgrade in next two years if India's external position continues to deteriorate, GDP growth prospects diminish, or progress on fiscal reforms remains slow, it said.
Among the four 'BRIC' countries, India currently has the lowest credit rating and is the only one with a negative outlook. Russia and Brazil have 'BBB' long-term foreign currency ratings and China has an 'AA-' rating.
Major losers in Sensex today were Cipla (2.25 pc), BHEL (2.21 pc), L&T (1.99 pc), Jindal Steel (1.93 pc), Tata Motors (1.40 pc), Hero MotoCorp (1.36 pc), Dr Reddy (1.21 pc), ONGC 1.18 pc), M&M (1.13 pc) and Reliance Industries (1.08 pc).
However, Tata Power firmed up by 2.18 per cent, followed by Bajaj Auto (1.85 pc), HUL (1.58 pc), Gail India (1.55 pc) and Coal India (1.44 pc) were among the 12 Sensex gainers.
Among the sectoral indices, the BSE-Capital Goods fell by 1.64 per cent, followed by the BSE-Healthcare (1.34 pc) and the BSE-Realty (1.02 pc). The BSE-Consumer Durable index moved up by 0.99 per cent.
"IIP numbers for the month of April to be released tomorrow and inflation data to be released on 14th June will provide cues for any policy change in the RBI meet on 18th," said Sharmila Joshi, Head Equity, Fairwealth Securities.
The total turnover declined further to Rs 1,947.16 crore from the last Friday's level of Rs 1,970.93 crore.
Foreign institutional investors (FIIs) bought shares worth a net Rs 202.01 crore last Friday as per provisional figures from the stock exchanges.