■ 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 — 765 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)SPY open contracts per strike for Fri, Oct 30.
Open-interest change · 2026-10-27 → 2026-10-28
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. Only strikes observed on both days are compared; 10 strikes were in only one day’s snapshot (each keeps its largest strikes) and are left out. Biggest moves: 755 −56K · 745 −44K · 766 +10K · 775 +4K
Volume by strike · Fri, Oct 30
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 30
— call IV— put IVATM ≈ 15.3% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 30
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, Oct 30
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.88
-0.45
760
0.0190
0.12
-0.45
-0.12
0.84
-0.57
762
0.0234
0.14
-0.57
-0.15
0.82
-0.63
763
0.0259
0.15
-0.63
-0.18
0.77
-0.76
765
0.0310
0.17
-0.77
-0.23
0.74
-0.82
766
0.0335
0.19
-0.83
-0.26
0.64
-0.97
769
0.0407
0.21
-0.99
-0.37
0.60
-1.00
770
0.0426
0.22
-1.02
-0.41
0.56
-1.02
771
0.0442
0.23
-1.04
-0.45
0.37
-0.90
775
0.0450
0.22
-0.94
-0.64
0.28
-0.74
777
0.0414
0.20
-0.77
-0.73
0.16
-0.45
780
0.0314
0.14
-0.44
-0.86
0.13
-0.36
781
0.0274
0.13
-0.34
-0.89
0.10
-0.28
782
0.0233
0.11
-0.26
-0.92
0.08
-0.21
783
0.0193
0.09
-0.19
-0.94
0.04
-0.12
785
0.0126
0.06
-0.11
-0.97
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.