■ 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 — 28 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)PPC 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
0.99
0.00
21
0.0064
0.00
-0.00
-0.01
0.99
-0.00
22
0.0109
0.00
-0.00
-0.01
0.98
-0.01
23
0.0201
0.00
-0.01
-0.02
0.96
-0.01
24
0.0400
0.00
-0.01
-0.04
0.91
-0.02
25
0.0781
0.01
-0.02
-0.09
0.81
-0.03
26
0.1384
0.01
-0.03
-0.19
0.64
-0.04
27
0.1963
0.01
-0.04
-0.36
0.43
-0.05
28
0.2021
0.02
-0.05
-0.56
0.27
-0.04
29
0.1595
0.01
-0.04
-0.73
0.16
-0.03
30
0.1096
0.01
-0.03
-0.84
0.10
-0.02
31
0.0717
0.01
-0.02
-0.90
0.06
-0.02
32
0.0467
0.01
-0.02
-0.94
0.04
-0.01
33
0.0308
0.00
-0.01
-0.96
0.03
-0.01
34
0.0207
0.00
-0.01
-0.97
0.02
-0.01
35
0.0142
0.00
-0.00
-0.98
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 16 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.