■ 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 — 80 — is the max pain price.
Open interest by strike · Fri, Sep 18
■ calls (up)■ puts (down)GM open contracts per strike for Fri, Sep 18.
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, Sep 18
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Sep 18
— call IV— put IVATM ≈ 33.3% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Sep 18
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, Sep 18
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.95
-0.01
72.5
0.0087
0.03
-0.01
-0.05
0.93
-0.01
75
0.0124
0.04
-0.02
-0.07
0.89
-0.02
77.5
0.0172
0.06
-0.02
-0.11
0.84
-0.03
80
0.0228
0.08
-0.03
-0.16
0.77
-0.04
82.5
0.0286
0.09
-0.04
-0.23
0.69
-0.04
85
0.0337
0.11
-0.04
-0.31
0.60
-0.04
87.5
0.0373
0.12
-0.04
-0.41
0.50
-0.05
90
0.0387
0.12
-0.05
-0.50
0.41
-0.04
92.5
0.0379
0.12
-0.04
-0.60
0.32
-0.04
95
0.0350
0.11
-0.04
-0.68
0.25
-0.04
97.5
0.0307
0.10
-0.04
-0.76
0.19
-0.03
100
0.0258
0.08
-0.03
-0.82
0.10
-0.02
105
0.0165
0.06
-0.02
-0.92
0.05
-0.01
110
0.0098
0.03
-0.01
-0.97
0.03
-0.01
115
0.0058
0.02
-0.02
-1.00
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 35 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.