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 — 330 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)HEI 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 ≈ 33.9% · 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
0.95
-0.10
290
0.0021
0.09
-0.10
-0.05
0.93
-0.13
300
0.0030
0.11
-0.13
-0.07
0.91
-0.15
310
0.0042
0.14
-0.15
-0.09
0.87
-0.18
320
0.0058
0.18
-0.18
-0.13
0.81
-0.21
330
0.0080
0.23
-0.21
-0.19
0.73
-0.24
340
0.0107
0.28
-0.25
-0.27
0.61
-0.27
350
0.0132
0.33
-0.27
-0.39
0.47
-0.27
360
0.0142
0.34
-0.27
-0.53
0.34
-0.25
370
0.0131
0.32
-0.25
-0.66
0.24
-0.21
380
0.0106
0.27
-0.22
-0.77
0.16
-0.18
390
0.0080
0.21
-0.18
-0.84
0.12
-0.15
400
0.0060
0.17
-0.15
-0.89
0.08
-0.12
410
0.0045
0.13
-0.13
-0.93
0.06
-0.10
420
0.0034
0.11
-0.11
-0.95
0.05
-0.09
430
0.0026
0.09
-0.09
-0.96
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 34 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.