Event risk before this expiration:Jobs report Fri, Aug 7 · CPI release Wed, Aug 12 — 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 — 880 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)CAT open contracts per strike for Fri, Aug 21.
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, Aug 21
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Aug 21
— call IV— put IVATM ≈ 42.2% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Aug 21
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, Aug 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.84
-0.60
790
0.0032
0.43
-0.63
-0.17
0.80
-0.69
800
0.0036
0.49
-0.71
-0.20
0.76
-0.77
810
0.0041
0.54
-0.79
-0.24
0.72
-0.84
820
0.0045
0.59
-0.86
-0.28
0.67
-0.90
830
0.0048
0.63
-0.92
-0.33
0.62
-0.95
840
0.0051
0.66
-0.96
-0.38
0.57
-0.98
850
0.0053
0.69
-0.99
-0.43
0.52
-0.99
860
0.0054
0.69
-1.00
-0.49
0.46
-0.98
870
0.0054
0.69
-0.99
-0.54
0.41
-0.96
880
0.0053
0.68
-0.96
-0.59
0.38
-0.94
885
0.0052
0.67
-0.94
-0.62
0.36
-0.92
890
0.0051
0.65
-0.92
-0.65
0.31
-0.86
900
0.0048
0.62
-0.86
-0.69
0.27
-0.80
910
0.0045
0.57
-0.79
-0.74
0.23
-0.73
920
0.0041
0.53
-0.72
-0.78
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 60 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.