Event risk before this expiration:FOMC decision Wed, Oct 28 · Jobs report Fri, Nov 6 · CPI release Tue, Nov 10 — 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 — 340 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)GD open contracts per strike for Fri, Nov 20.
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, Nov 20
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Nov 20
— call IV— put IVATM ≈ 26.5% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Nov 20
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, Nov 20
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.98
-0.01
260
0.0010
0.04
-0.02
-0.01
0.98
-0.02
270
0.0015
0.06
-0.03
-0.02
0.96
-0.03
280
0.0025
0.09
-0.04
-0.04
0.94
-0.05
290
0.0040
0.14
-0.05
-0.07
0.89
-0.07
300
0.0062
0.20
-0.07
-0.11
0.82
-0.10
310
0.0092
0.28
-0.10
-0.18
0.71
-0.12
320
0.0125
0.37
-0.12
-0.29
0.58
-0.14
330
0.0148
0.42
-0.14
-0.43
0.43
-0.14
340
0.0149
0.42
-0.14
-0.58
0.29
-0.12
350
0.0130
0.37
-0.12
-0.72
0.19
-0.10
360
0.0100
0.29
-0.10
-0.83
0.12
-0.07
370
0.0072
0.22
-0.08
-0.91
0.07
-0.05
380
0.0049
0.15
-0.06
-0.96
0.05
-0.04
390
0.0032
0.11
-0.03
-0.99
0.03
-0.03
400
0.0021
0.07
-0.03
-1.00
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 30 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.