After opening on a positive note, the 30-share index turned choppy to trade 54.61 points, or 0.14 per cent, lower at 40,061.45.
The 30-share Sensex ended 229.02 points, or 0.57 per cent, lower at 40,116.06.
The 30-share index pared gains to trade 19.98 points, or 0.05 per cent, higher at 40,365.06.
The 30-share index pared some losses to trade 4.57 points, or 0.01 per cent, lower at 40,319.04.
The 30-share Sensex briefly turned positive to hit a fresh intra-day high of 40,749.33
Top losers in the Sensex pack included Sun Pharma, HUL, Bharti Airtel, NTPC, PowerGrid and RIL, shedding up to 1.69 pc.
The 30-share index was trading 202.93 points, or 0.50 per cent, higher at 40,672.71.
Tech Mahindra, Yes Bank, Infosys, Vedanta, M&M and L&T too fell up to 1.13 per cent.
The 30-share index pared all gains to trade 41.28 points, or 0.10 per cent, lower at 40,260.68.
Top gainers in the Sensex pack included Vedanta, Tata Steel, ICICI Bank, Tata Motors, SBI, HCL Tech, Sun Pharma.