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The expiry brief

Every trading day at 09:20 and 15:35 IST, Finostat reads its own option chains and writes down what the market is pricing: NIFTY's expected move from the ATM straddle, India VIX, skew, and four strategies with exact breakevens and max loss. No opinions — the numbers, and what they mean.

Latest · Friday, 18 September 2026

close snapshot · 15:35 IST

NIFTY spot23,346.40
+0.33% today
23350 straddle · 22 Sep₹180.80
92.30 CE + 88.50 PE
Implied move±0.77%
±181 pts · 4.0 days
Expected range23,166 – 23,527
spot ± straddle
ATM IV9.3%
skew +1.4 pts
India VIX11.41
PCR · max pain1.00 · 23,350
OI walls23,300 / 23,400
put floor / call ceiling

NIFTY is at 23,346.40, +0.33% on the day. The 23350 straddle for the 22 Sep expiry costs ₹180.80 (92.30 call + 88.50 put), which is the market pricing a one-standard-deviation move of about ±181 points, ±0.77%, over the 4.0 days to expiry. Read that as the expected range: 23,166 to 23,527. Roughly two expiries in three should finish inside it; the third is where the money is made and lost.

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How to use it

Compare the implied move with what you expect. If the straddle is pricing ±0.8% and you think a result or an RBI decision makes ±1.5% plausible, the long side is cheap; if the range looks generous for a dull week, defined-risk selling is being paid. Then open the builder, size for the worst plausible loss, and journal the comparison — Finch chapter 6 explains the straddle rule, chapter 11 the sizing.

The expiry brief is generated by Finostat's server from its live option chains at fixed times and written up from templates; it is education and market description, not a recommendation. Prices are indicative and can be stale. Derivatives can lose more than you put in. Finostat is not a SEBI-registered adviser.