Nifty Weekly Expiry: PCR at 0.68 as Index Slips Below 23,400 After Gap-Up Opening

The Nifty 50 gave up a large part of its opening gains on September 15, 2026, as selling emerged at higher levels ahead of the weekly expiry.

At around 10:00 AM, the index was trading at 23,386.45, down 11.65 points or 0.05%. Nifty had opened sharply higher at 23,576.15 and touched an intraday high of 23,592.85 before falling to a low of 23,371.85.

The movement comes after a weak previous session. On September 11, Nifty closed at 23,398.10, down 0.34%, after recovering from an intraday low of 23,231.40. Tuesday's strong gap-up initially indicated a better start, but the inability to hold higher levels has brought the index back close to the previous closing price.

Options data at around 10:00 AM shows a put-call ratio of 0.68, while maximum pain is placed at 23,400, almost in line with the prevailing index level.

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PCR Points to Heavier Call Positioning

The put-call ratio, or PCR, stands at 0.68. PCR compares outstanding Put open interest with Call open interest. A reading below 1 indicates that Call open interest is higher than Put open interest.

The current reading therefore suggests that Call-side positioning remains heavier going into the expiry session. This fits with the price action seen after the opening, when Nifty struggled to sustain the gap-up and slipped more than 200 points from its intraday high.

However, PCR should not be viewed as a standalone directional indicator. Changes in open interest at individual strikes provide a clearer picture of where traders are positioning for the remainder of the session.

Key Nifty Options Data

The options structure shows an interesting divergence between existing positions and fresh additions. Large outstanding positions remain concentrated at higher strikes, while new positions are being added closer to or below the current index level.

Call OI Creates Overhead Resistance

The highest Call open interest is concentrated at 23,500 and 23,600, making this area an important overhead supply zone.

This positioning is particularly relevant because Nifty opened above 23,500 but failed to hold there. The index's intraday high of 23,592.85 was also close to the upper end of this Call concentration before selling pushed it sharply lower.

Fresh Call additions, meanwhile, are strongest at 23,300 and 23,000. Since these strikes are below the current market price, they indicate active repositioning as the index gives up its opening advance. Such additions can include fresh bearish positions as well as adjustments to existing expiry trades. The inability to sustain above the larger Call OI zone remains the more important signal from the morning price action.

Fresh Put Writing Moves Towards Lower Strikes

On the Put side, the largest outstanding open interest is at 23,500 and 23,450. However, the index has already moved below both strikes during the morning session.

More importantly, fresh Put additions are concentrated at 23,300 and 23,350. This suggests that traders adding new Put positions are looking towards lower strikes after the sharp reversal from the day's high.

The shift in fresh positioning brings the 23,300–23,350 area into focus if weakness continues. Nifty's intraday low of 23,371.85 is already close to this zone, meaning the market is approaching the area where new Put writing has become active.

A sustained move below these strikes could lead to further adjustment in Put positions and increase volatility during the expiry session.

Maximum Pain Sits Close to the Spot Price

Maximum pain is placed at 23,400, just above the index's 10:00 AM level.

Maximum pain represents the strike where the combined payout to option buyers would theoretically be the lowest based on outstanding open interest. It is commonly tracked on expiry days as a reference point, although it does not guarantee where the index will eventually settle.

Its proximity to the current market price suggests that 23,400 may remain an important area during the session, particularly if the index continues to move within a narrow range after the sharp opening reversal.

What the Expiry Setup Indicates

The morning derivatives setup remains cautious. Nifty's failure to hold a gap-up of nearly 180 points has brought the focus back to nearby options positioning.

The larger Call base at higher strikes indicates that a meaningful recovery could face resistance, while fresh Put additions at lower levels show that traders are adjusting their support expectations after the decline.

The final direction will depend on whether buying returns after the sharp intraday reversal or whether Call-side pressure continues to keep the index below its opening range.

Conclusion

Nifty entered the weekly expiry with a strong gap-up but quickly surrendered the advance and was trading marginally lower at 23,386.45 by 10:00 AM.

With the PCR at 0.68 and maximum pain close to the prevailing market price, the derivatives setup remains tilted towards caution. The key development to track from here is whether fresh Put positioning at lower strikes can absorb further selling or whether the morning reversal leads to additional weakness as expiry progresses.