■ 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 — 790 — is the max pain price.
Open interest by strike · Fri, Sep 18
■ calls (up)■ puts (down)CAT 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 ≈ 42.6% · 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
0.75
-0.43
790
0.0025
0.95
-0.47
-0.26
0.72
-0.46
800
0.0026
1.00
-0.49
-0.28
0.69
-0.48
810
0.0028
1.04
-0.51
-0.31
0.66
-0.50
820
0.0029
1.08
-0.53
-0.34
0.63
-0.52
830
0.0030
1.11
-0.54
-0.37
0.60
-0.53
840
0.0031
1.14
-0.55
-0.40
0.57
-0.54
850
0.0031
1.16
-0.56
-0.44
0.54
-0.55
860
0.0032
1.17
-0.56
-0.47
0.51
-0.55
870
0.0032
1.18
-0.56
-0.50
0.47
-0.55
880
0.0032
1.17
-0.56
-0.53
0.44
-0.55
890
0.0032
1.16
-0.55
-0.56
0.41
-0.54
900
0.0031
1.15
-0.54
-0.59
0.35
-0.52
920
0.0030
1.10
-0.50
-0.66
0.30
-0.48
940
0.0028
1.03
-0.46
-0.71
0.25
-0.45
960
0.0026
0.94
-0.41
-0.76
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 60 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.