■ 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 — 115 — is the max pain price.
Open interest by strike · Fri, Aug 21
■ calls (up)■ puts (down)WPM 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 ≈ 40.6% · 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
-0.07
121
0.0127
0.02
-0.07
-0.06
0.90
-0.10
124
0.0207
0.03
-0.10
-0.10
0.88
-0.12
125
0.0241
0.04
-0.12
-0.12
0.86
-0.13
126
0.0279
0.04
-0.13
-0.15
0.80
-0.16
128
0.0361
0.05
-0.16
-0.21
0.72
-0.19
130
0.0443
0.06
-0.19
-0.29
0.63
-0.21
132
0.0505
0.07
-0.21
-0.38
0.47
-0.23
135
0.0528
0.07
-0.22
-0.54
0.42
-0.22
136
0.0514
0.07
-0.22
-0.59
0.25
-0.18
140
0.0396
0.06
-0.18
-0.76
0.12
-0.12
145
0.0234
0.04
-0.12
-0.88
0.06
-0.08
150
0.0130
0.02
-0.08
-0.94
0.03
-0.05
155
0.0073
0.01
-0.05
-0.97
0.02
-0.03
160
0.0042
0.01
-0.03
-0.98
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 14 strikes around the money — all 28 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.