New Delhi, Aug. 4 -- Domestic market benchmarks displayed a rare feat on Tuesday, 4 August, when the 30-share pack Sensex jumped over 0.60%, while the NSE barometer Nifty 50 plunged over 1% during the session. This sharp divergence in the frontline indices perplexed investors.

In the previous session, the Sensex rose 544 points, or 0.70%, to end at 78,639, while the Nifty 50 jumped 391 points, or 1.60%, to settle at 24,774.30. The Nifty surged nearly 201 points in the final two minutes of Monday's trade, thanks to the implementation of the Closing Auction Session (CAS) in the equity cash segment, which became operational on the same day.

The same factor is driving the divergence in benchmarks on Tuesday, also.

"Due to the recent change...