■ 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 — 82.5 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)BHP open contracts per strike for Fri, Nov 20.
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, Nov 20
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Nov 20
— call IV— put IVATM ≈ 39.0% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Nov 20
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, Nov 20
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.87
-0.02
72.5
0.0126
0.10
-0.02
-0.15
0.84
-0.03
75
0.0147
0.12
-0.03
-0.18
0.79
-0.03
77.5
0.0165
0.14
-0.03
-0.22
0.75
-0.03
80
0.0181
0.15
-0.03
-0.27
0.70
-0.03
82.5
0.0194
0.17
-0.03
-0.31
0.64
-0.03
85
0.0204
0.18
-0.03
-0.36
0.59
-0.04
87.5
0.0211
0.18
-0.04
-0.42
0.54
-0.04
90
0.0215
0.19
-0.04
-0.47
0.48
-0.04
92.5
0.0215
0.19
-0.04
-0.53
0.43
-0.04
95
0.0212
0.19
-0.04
-0.58
0.39
-0.03
97.5
0.0206
0.18
-0.04
-0.63
0.34
-0.03
100
0.0197
0.17
-0.03
-0.68
0.26
-0.03
105
0.0174
0.15
-0.03
-0.76
0.20
-0.03
110
0.0147
0.13
-0.03
-0.82
0.15
-0.02
115
0.0121
0.11
-0.02
-0.88
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 30 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.