The BSE Sensex opened at 74,594.65 down 134.62 points and the NSE Nifty 50 opened at 23,096.85 down 49.30 points on Monday.
Investors tracked mixed September-quarter results from private lenders HDFC Bank and ICICI Bank alongside Brent crude trading at around $108 a barrel.
Foreign portfolio investors turned net buyers on Friday after 15 consecutive sessions, purchasing shares worth ₹11.66 billion.