■ 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 — 26 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)ZSL 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 ≈ 85.7% · 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
0.96
-0.03
17
0.0190
0.00
-0.03
-0.05
0.94
-0.03
18
0.0256
0.00
-0.03
-0.06
0.92
-0.04
19
0.0349
0.01
-0.04
-0.09
0.89
-0.04
20
0.0478
0.01
-0.04
-0.12
0.84
-0.05
21
0.0653
0.01
-0.05
-0.16
0.77
-0.06
22
0.0874
0.01
-0.06
-0.23
0.67
-0.07
23
0.1098
0.01
-0.07
-0.33
0.55
-0.07
24
0.1232
0.01
-0.07
-0.45
0.43
-0.07
25
0.1210
0.01
-0.07
-0.57
0.38
-0.07
25.5
0.1150
0.01
-0.07
-0.62
0.33
-0.07
26
0.1071
0.01
-0.07
-0.67
0.29
-0.07
26.5
0.0984
0.01
-0.07
-0.71
0.25
-0.06
27
0.0896
0.01
-0.06
-0.74
0.20
-0.06
28
0.0732
0.01
-0.06
-0.80
0.17
-0.05
28.5
0.0661
0.01
-0.05
-0.82
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 49 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.