Sensex and Nifty closed flat after a volatile session, each falling 0.08%. Sensex ended at 80,364.94 and Nifty at 24,634.9. Titan, SBI, and NTPC gained, while Axis Bank and Maruti lagged. MidCaps rose 0.27%, SmallCaps slipped. Pharma and Auto dipped, but PSU Bank and Oil & Gas indices gained over 1%.