By Abhishek Vishnoi
MUMBAI (Reuters) - Profit-taking in blue-chips such as ICICI Bank hit shares on Tuesday, reversing some of the previous session's gains on doubts about how quickly the Iranian nuclear accord would translate into higher supplies that pressure oil prices.
Lenders, who had been among the leading gainers on Monday, also fell after Standard & Poor's downgraded state-run IDBI Bank
Caution also prevailed ahead of the expiry of November derivatives contracts on Thursday and July-September gross domestic product data on Friday.
"Valuations are not undemanding anymore and therefore I would be slightly cautious on markets at current levels," said Dipen Shah, head of Private Client Group Research, Kotak Securities.
"Upcoming GDP data would re-calibrate estimates but more importantly one should look out for reforms getting executed at ground level," he added.
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The broader Nifty fell 0.92 percent, or 56.25 points, to end at 6,059.10, after gaining 2 percent on Monday.
The Sensex fell 0.87 percent, or 180.06 points, to end at 20,425.02.
Banks were among the day's leading decliners, with ICICI Bank
IDBI Bank fell 1.5 percent after S&P downgraded the lender's rating to below investment grade citing expectations for weaker asset quality.
IDBI's offshore debt tumbled, with the yield on 2019 bonds widening 30 basis points.
Shares in other state-run lenders also fell, with their dollar-denominated bonds tumbling as well. State Bank of India
State-run oil companies fell on profit taking, with Hindustan Petroleum Corp
Indian Oil Corp
Shares that will be excluded from MSCI indices, starting on Wednesday, also tumbled on the last day when investors could sell the shares.
Bank of India
Among other MSCI exclusions, Wockhardt
However, Yes Bank Ltd
(Editing by Sunil Nair)