Buy or sell stocks, Aug. 5 -- Indian benchmark indices witnessed an unusual divergence on Tuesday, August 4, with the 30-share Sensex climbing more than 0.60% while the NSE Nifty 50 tumbled over 1% during the session. The contrasting moves in the two key indices left investors puzzled.

In the previous trading session, the Sensex had gained 544 points, or 0.70%, to close at 78,639, while the Nifty 50 advanced 391 points, or 1.60%, to finish at 24,774.30. The Nifty rallied nearly 201 points in the final two minutes of Monday's session following the rollout of the Closing Auction Session (CAS) in the equity cash segment, which came into effect that day.

Nifty 50 ended the session on a weak note, closing at 24,614.90, down 159.40 points (-0...