■ 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 — 760 — is the max pain price.
Open interest by strike · Wed, Sep 16
■ calls (up)■ puts (down)SPY open contracts per strike for Wed, Sep 16.
Open-interest change · 2026-09-10 → 2026-09-11
Net contracts opened (up, green) or closed (down, red) per strike since the previous snapshot — where the walls are building and where they’re unwinding. Biggest moves: 722 +3K · 779 +2K · 799 +2K · 758 +1K
Volume by strike · Wed, Sep 16
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Wed, Sep 16
— call IV— put IVATM ≈ 10.8% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Wed, Sep 16
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 · Wed, Sep 16
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.75
-0.36
757
0.0280
0.29
-0.36
-0.25
0.73
-0.38
758
0.0301
0.30
-0.38
-0.27
0.70
-0.39
759
0.0321
0.31
-0.39
-0.30
0.67
-0.40
760
0.0342
0.33
-0.40
-0.33
0.64
-0.40
761
0.0362
0.34
-0.41
-0.36
0.60
-0.41
762
0.0380
0.35
-0.41
-0.40
0.57
-0.41
763
0.0396
0.35
-0.41
-0.44
0.53
-0.40
764
0.0410
0.36
-0.41
-0.48
0.49
-0.40
765
0.0419
0.36
-0.40
-0.52
0.44
-0.38
766
0.0423
0.35
-0.39
-0.56
0.40
-0.37
767
0.0422
0.35
-0.38
-0.61
0.36
-0.35
768
0.0414
0.34
-0.36
-0.65
0.31
-0.32
769
0.0400
0.32
-0.33
-0.70
0.27
-0.29
770
0.0380
0.30
-0.30
-0.74
0.23
-0.26
771
0.0355
0.28
-0.27
-0.78
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 history — nearest expiry vs price
— max pain (nearest expiry)- - delayed closeOne point per snapshot day since 2026-07-28; unobserved days are gaps, not guesses.
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.