The BSE Sensex on Monday fell 25.47 points to 25838.03 in the early trade and the Nifty plummeted 5.90 points to 7862.60, amid weak Asian markets.
The rupee was quoting at 66.05 to the US Dollar, up 10 paise over its previous close.
Meanwhile, investors also remained jittery, ahead of the expected Reserve Bank of India policy review tomorrow.