■ 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 — 14 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)ASST 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 ≈ 99.8% · 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
-0.01
9.5
0.0182
0.00
-0.01
-0.01
0.98
-0.01
10
0.0284
0.00
-0.01
-0.02
0.97
-0.01
10.5
0.0452
0.00
-0.01
-0.04
0.94
-0.02
11
0.0730
0.00
-0.02
-0.06
0.90
-0.03
11.5
0.1179
0.00
-0.03
-0.10
0.84
-0.04
12
0.1834
0.00
-0.04
-0.16
0.73
-0.05
12.5
0.2596
0.01
-0.05
-0.27
0.58
-0.06
13
0.3118
0.01
-0.06
-0.42
0.43
-0.06
13.5
0.3090
0.01
-0.06
-0.57
0.29
-0.06
14
0.2619
0.01
-0.06
-0.70
0.20
-0.05
14.5
0.2018
0.00
-0.05
-0.80
0.13
-0.04
15
0.1483
0.00
-0.04
-0.87
0.09
-0.03
15.5
0.1070
0.00
-0.03
-0.91
0.06
-0.02
16
0.0768
0.00
-0.02
-0.94
0.04
-0.02
16.5
0.0554
0.00
-0.01
-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 37 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.