■ 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 — 100 — is the max pain price.
Open interest by strike · Fri, Sep 18
■ calls (up)■ puts (down)BXC 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 ≈ 64.1% · 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
0.99
-0.01
35
0.0007
0.01
-0.01
-0.01
0.99
-0.02
40
0.0010
0.01
-0.02
-0.01
0.95
-0.04
55
0.0038
0.03
-0.04
-0.05
0.93
-0.04
60
0.0056
0.04
-0.04
-0.07
0.85
-0.07
70
0.0115
0.06
-0.07
-0.15
0.78
-0.08
75
0.0155
0.08
-0.08
-0.22
0.69
-0.09
80
0.0194
0.10
-0.09
-0.31
0.58
-0.10
85
0.0222
0.10
-0.10
-0.42
0.47
-0.10
90
0.0229
0.11
-0.10
-0.53
0.37
-0.09
95
0.0215
0.10
-0.10
-0.64
0.28
-0.09
100
0.0189
0.09
-0.09
-0.72
0.22
-0.08
105
0.0159
0.08
-0.08
-0.79
0.17
-0.07
110
0.0132
0.07
-0.07
-0.84
0.13
-0.06
115
0.0108
0.06
-0.06
-0.88
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. 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.