Dec 8 (Reuters) - Indian shares logged their worst session in more than two months on Monday, amid uncertainty over a trade deal with the U.S. and persistent foreign outflows, while the country's top airline IndiGo fell 8.3%, continuing to reel from an operational crisis.
The Nifty 50 lost 0.86% to 25,960.55, and the BSE Sensex slid 0.71% to 85,102.69, in their biggest single-day drop since September 26.
All 16 major sectors ended lower. The broader mid-caps and small-caps lost 1.8% and 2.6%, respectively.
Foreign investors have sold over $1 billion of local stocks on a net basis so far in December, putting the year-to-date outflows at nearly $18 billion, according to data from the National Securities Depository Ltd.
Investors were also cautious ahead of the U.S. Federal Reserve's policy decision later this week and over how effectively the Reserve Bank of India's rate cuts will be transmitted.
"RBI's rate cut transmission may not happen soon due high credit-deposit ratio. This, coupled with persistent tariff uncertainty, is weighing on the market," said Anita Gandhi, founder and head of institutional business at Arihant Capital Markets.
JP Morgan said the RBI's rate cut on Friday could be its last in this cycle, with inflation expected to rise to 4% and growth holding up.
Heavyweight financials and information technology stocks slipped 0.7% and 0.3%, respectively.
Public sector banks, real estate, and defence sector indexes fell between 2.8% and 3.7%.
Among stocks, IndiGo was the biggest loser among Nifty 50 stocks, extending last week's slide.
The country's aviation watchdog issued a show cause notice to the airline after thousands of flights were cancelled last week, grounding tens of thousands of passengers.
(Reporting by Vivek Kumar M in Bengaluru; Editing by Sumana Nandy, Rashmi Aicha and Eileen Soreng)
By Vivek Kumar M
