Event risk before this expiration:FOMC decision Wed, Oct 28 — 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 — 390 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)MAR open contracts per strike for Fri, Oct 30.
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 30
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 30
— call IV— put IVATM ≈ 29.0% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 30
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 30
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.85
-0.30
372.5
0.0125
0.13
-0.30
-0.15
0.83
-0.32
375
0.0144
0.14
-0.33
-0.17
0.79
-0.35
377.5
0.0166
0.16
-0.35
-0.21
0.75
-0.38
380
0.0189
0.17
-0.38
-0.25
0.71
-0.41
382.5
0.0210
0.19
-0.41
-0.30
0.65
-0.43
385
0.0229
0.20
-0.44
-0.35
0.59
-0.45
387.5
0.0244
0.21
-0.46
-0.41
0.53
-0.46
390
0.0253
0.22
-0.46
-0.47
0.47
-0.46
392.5
0.0256
0.22
-0.46
-0.54
0.41
-0.44
395
0.0251
0.21
-0.44
-0.60
0.34
-0.41
397.5
0.0239
0.20
-0.42
-0.66
0.29
-0.38
400
0.0222
0.19
-0.38
-0.72
0.24
-0.34
402.5
0.0200
0.17
-0.35
-0.77
0.20
-0.31
405
0.0176
0.15
-0.31
-0.81
0.16
-0.28
407.5
0.0153
0.14
-0.28
-0.84
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 46 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.