Mumbai, May 21 -- The key equity indices ended marginally lower on Thursday as reports of possible RBI intervention to defend the rupee unnerved investors. Reports indicated that the Reserve Bank of India is considering a range of measures to stabilise the currency, including a rate hike, additional currency swaps and raising dollars from overseas investors. Persistent FII selling and profit booking at elevated valuations further weighed on sentiment, while weak global cues added to the pressure. The Nifty slipped below the 23,700 mark, dragged down by steep losses in IT and FMCG stocks.

The S&P BSE Sensex declined 135.03 points or 0.18% to 75,183.36. The Nifty 50 index fell 4.30 points or 0.02% to 23,654.70.

Infosys (down 1.05%), Bhart...