■ 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 — 75 — is the max pain price.
Open interest by strike · Fri, Sep 18
■ calls (up)■ puts (down)BHP 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 ≈ 38.8% · 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
-0.02
72.5
0.0086
0.03
-0.03
-0.09
0.92
-0.03
75
0.0120
0.04
-0.03
-0.12
0.89
-0.03
77.5
0.0163
0.05
-0.04
-0.16
0.84
-0.04
80
0.0213
0.07
-0.04
-0.21
0.78
-0.05
82.5
0.0267
0.09
-0.05
-0.27
0.71
-0.06
85
0.0315
0.10
-0.05
-0.34
0.62
-0.06
87.5
0.0351
0.11
-0.06
-0.43
0.53
-0.06
90
0.0367
0.12
-0.06
-0.51
0.44
-0.06
92.5
0.0361
0.12
-0.05
-0.59
0.36
-0.06
95
0.0337
0.11
-0.05
-0.67
0.29
-0.05
97.5
0.0301
0.10
-0.05
-0.73
0.23
-0.04
100
0.0260
0.09
-0.04
-0.79
0.14
-0.03
105
0.0182
0.07
-0.03
-0.87
0.09
-0.02
110
0.0122
0.05
-0.02
-0.92
0.05
-0.02
115
0.0081
0.03
-0.02
-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.