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Nifty monthly expiry meets CAS today: Why the last 30 minutes of the Tuesday trading session could be most important
Mint 1 hr ago·29 Sept 2026, 6:29 am
Today the Nifty index faces both its weekly and monthly options expiry, and the market is also running the Closing Auction Session (CAS) for the first time. The convergence of these events tends to compress trading activity into a short window, often leading to sharper price moves in the final minutes of the session.
For investors, the dual expiry means many option contracts will be settled, which can trigger rapid buying or selling as traders unwind positions. The CAS adds another layer of intensity, as orders are matched in a single, high‑volume auction, amplifying any underlying volatility.
Traders should keep an eye on order flow and the index’s support‑resistance levels during the last half hour, as well as any unexpected news that could sway sentiment. After the expiry, volatility typically eases, but the next week’s expiry and any macro data releases will set the tone for the market’s direction.
Excerpt from Mint
As Nifty is set for both weekly and monthly options expiry, heightened volatility is expected in today's trading session. The introduction of the Closing Auction Session (CAS) is intensifying price swings, prompting a closer look at how these elements influence index behaviour and market strategies. Market…Read the original at Mint
Key takeaways
- Category: Stocks.
- Assessed as a significant, market-relevant update.
Why it matters
A meaningful update worth tracking. Use the price and stock snapshot to gauge how the market is responding.
