Event risk before this expiration:CPI release Wed, Oct 14 — macro releases historically overwhelm pinning effects; max pain reads weakest in event weeks.
■ put-side pain■ call-side painTotal payout option writers would owe at each settle price (both sides, all open interest, ×100 shares) — low settles hurt put writers, high settles hurt call writers. The minimum — 370 — is the max pain price.
Open interest by strike · Fri, Oct 23
■ calls (up)■ puts (down)V open contracts per strike for Fri, Oct 23.
Open-interest change — building vs unwinding
Needs two observed snapshot days for this expiration — the comparison appears automatically once the next weekday snapshot lands. We diff real observations only; nothing is estimated.
Volume by strike · Fri, Oct 23
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 23
— call IV— put IVATM ≈ 20.5% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 23
Net dealer gamma per strike, in dollars per 1% move, assuming the standard convention (dealers long calls, short puts) — an assumption, not an observation. Above the amber flip level hedging tends to dampen moves; below it, to amplify them.
Greeks by strike · Fri, Oct 23
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.88
-0.13
372.5
0.0130
0.14
-0.13
-0.12
0.85
-0.15
375
0.0158
0.16
-0.15
-0.15
0.81
-0.17
377.5
0.0188
0.18
-0.18
-0.19
0.76
-0.20
380
0.0218
0.21
-0.20
-0.24
0.71
-0.22
382.5
0.0248
0.23
-0.22
-0.29
0.64
-0.23
385
0.0272
0.25
-0.24
-0.36
0.57
-0.24
387.5
0.0290
0.27
-0.25
-0.43
0.50
-0.25
390
0.0297
0.27
-0.25
-0.51
0.43
-0.24
392.5
0.0294
0.27
-0.24
-0.58
0.36
-0.23
395
0.0280
0.25
-0.23
-0.65
0.29
-0.21
397.5
0.0257
0.23
-0.21
-0.72
0.23
-0.18
400
0.0228
0.21
-0.19
-0.78
0.14
-0.13
405
0.0164
0.15
-0.14
-0.88
0.08
-0.09
410
0.0107
0.10
-0.09
-0.94
0.04
-0.06
415
0.0066
0.07
-0.06
-0.98
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 48 are in the CSV. Δ per $1 of underlying · Θ per day · vega per IV point.
Stacked — layer the expirations
Call open interest per strike, stacked across the checked expirations — each color is one expiry. Strikes are pruned to the liquid center of each chain.
Max pain is arithmetic, not prophecy: the settle price that would minimize what option writers pay out at expiration, computed from open interest alone. Prices sometimes gravitate toward heavy strikes into expiry — dealer hedging is a real flow — but the evidence that max pain predicts settlement better than chance is mixed, and we are not going to pretend otherwise. Use it as a map of where positioning is stacked, next to the fundamentals and the earnings calendar, not as a target.
Data: Cboe delayed public feed (~15 minutes), refreshed here about every 15 minutes. Open interest itself updates once daily, before the open. Educational information, not investment advice.