■ 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 — 755 — is the max pain price.
Open interest by strike · Mon, Sep 21
■ calls (up)■ puts (down)SPY open contracts per strike for Mon, Sep 21.
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: 760 +4K · 755 +2K · 787 +1K · 757 +908
Volume by strike · Mon, Sep 21
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Mon, Sep 21
— call IV— put IVATM ≈ 10.9% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Mon, Sep 21
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 · Mon, Sep 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.70
-0.30
757
0.0247
0.43
-0.29
-0.34
0.68
-0.31
758
0.0259
0.44
-0.30
-0.37
0.66
-0.31
759
0.0270
0.45
-0.30
-0.39
0.63
-0.32
760
0.0281
0.46
-0.30
-0.42
0.61
-0.32
761
0.0291
0.48
-0.30
-0.44
0.58
-0.32
762
0.0300
0.48
-0.30
-0.47
0.55
-0.31
763
0.0308
0.49
-0.29
-0.50
0.52
-0.31
764
0.0315
0.49
-0.29
-0.53
0.49
-0.30
765
0.0319
0.49
-0.28
-0.56
0.45
-0.29
766
0.0322
0.49
-0.27
-0.59
0.42
-0.28
767
0.0321
0.48
-0.26
-0.62
0.39
-0.27
768
0.0319
0.47
-0.25
-0.65
0.35
-0.26
769
0.0313
0.46
-0.24
-0.68
0.32
-0.24
770
0.0305
0.45
-0.23
-0.71
0.20
-0.18
774
0.0247
0.36
-0.16
-0.83
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.