■ 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 — 340 — is the max pain price.
Open interest by strike · Fri, Oct 16
■ calls (up)■ puts (down)GD open contracts per strike for Fri, Oct 16.
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 16
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 16
— call IV— put IVATM ≈ 31.9% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 16
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 16
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.96
-0.12
315
0.0084
0.03
-0.12
-0.04
0.94
-0.15
317.5
0.0116
0.04
-0.15
-0.06
0.92
-0.20
320
0.0162
0.05
-0.20
-0.08
0.89
-0.25
322.5
0.0226
0.06
-0.26
-0.12
0.83
-0.33
325
0.0312
0.08
-0.33
-0.17
0.76
-0.40
327.5
0.0419
0.10
-0.41
-0.25
0.65
-0.47
330
0.0524
0.11
-0.48
-0.36
0.51
-0.50
332.5
0.0576
0.12
-0.51
-0.49
0.37
-0.47
335
0.0541
0.11
-0.47
-0.64
0.25
-0.40
337.5
0.0443
0.10
-0.40
-0.75
0.17
-0.31
340
0.0333
0.08
-0.31
-0.84
0.12
-0.24
342.5
0.0240
0.06
-0.24
-0.89
0.08
-0.18
345
0.0172
0.05
-0.18
-0.93
0.06
-0.14
347.5
0.0123
0.04
-0.13
-0.95
0.04
-0.10
350
0.0089
0.03
-0.10
-0.97
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 40 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.