What the option chain shows
Thursday's session delivered a sharp intraday turnaround, with both indices shaking off modest opening weakness to close firmly in the green. The Sensex led the charge, posting a 2.064% gain to finish at 74,315.61, while the Nifty gained 1.629% to close at 22,997.35—a meaningful recovery that erased the prior day's caution and then some.
The opening 30 minutes set a cautious tone. The Nifty gapped down 0.307% and the Sensex dipped 0.374%, signaling early hesitation. That neutral footing, however, proved fleeting. Around 10:30, sentiment shifted decisively bullish across both indices, and that conviction held without wavering through the close. Every subsequent checkpoint—11:30, 12:30, 1:30, and 2:30—maintained the same strong bullish lean, evidence of sustained buying pressure rather than a one-off spike.
Bias and readiness
The Sensex's larger percentage gain (204 basis points ahead of the Nifty) reflects the outsized participation among large-cap heavyweights, which often drive broader index performance. Both indices still faced intraday volatility: the Nifty's 419-point swing from its 22,637.40 low to its 23,056.40 high, and the Sensex's 1,433-point range from 72,896.38 to 74,330.29, show traders tested both extremes before the final push higher. Yet the closes landed decisively in the upper half of those ranges, underscoring the strength of the late-session bid.
What stands out is the sharpness of the reversal. Markets that open on the back foot often grind sideways or extend losses; Thursday inverted that script entirely within the first hour and never looked back. The consistency of the bullish bias across five successive half-hourly checkpoints suggests this was not a thin rally but a genuine shift in risk appetite, with buyers stepping in methodically rather than chasing late.
Levels to watch
The Sensex's outperformance is worth watching heading forward—it suggests institutional money and larger-cap flows drove much of the rebound, which can signal either broadening conviction or concentration among select holdings. The Nifty's 1.629% gain remains solid, but the 40-basis-point lag hints at potential weakness in the mid-cap and smallcap spaces that merit closer scrutiny.
Both indices closed well clear of their session lows, reinforcing the bullish tilt that emerged mid-morning. The shape of this reversal—neutral open, sharp 10:30 flip, sustained conviction thereafter—marks a distinct break from the prior session's character and establishes a measurably stronger foundation heading into Friday's trade.