■ 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, Aug 21
■ calls (up)■ puts (down)BAP 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 ≈ 48.0% · 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
0.94
-0.31
300
0.0021
0.07
-0.32
-0.06
0.93
-0.35
310
0.0028
0.08
-0.36
-0.07
0.91
-0.39
320
0.0037
0.10
-0.40
-0.09
0.88
-0.44
330
0.0050
0.12
-0.45
-0.12
0.84
-0.49
340
0.0067
0.14
-0.50
-0.16
0.77
-0.55
350
0.0091
0.18
-0.56
-0.23
0.68
-0.60
360
0.0119
0.21
-0.61
-0.32
0.55
-0.63
370
0.0141
0.23
-0.63
-0.45
0.41
-0.60
380
0.0143
0.23
-0.60
-0.59
0.28
-0.53
390
0.0122
0.20
-0.53
-0.72
0.20
-0.44
400
0.0094
0.16
-0.44
-0.81
0.13
-0.36
410
0.0070
0.13
-0.36
-0.87
0.10
-0.29
420
0.0052
0.10
-0.29
-0.91
0.07
-0.24
430
0.0038
0.08
-0.24
-0.94
0.05
-0.19
440
0.0028
0.06
-0.20
-0.95
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 32 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.