■ 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 — 768 — is the max pain price.
Open interest by strike · Thu, Oct 29
■ calls (up)■ puts (down)SPY open contracts per strike for Thu, Oct 29.
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; 12 strikes were in only one day’s snapshot (each keeps its largest strikes) and are left out. Biggest moves: 748 −4K · 770 +2K · 790 +2K · 769 +1K
Volume by strike · Thu, Oct 29
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Thu, Oct 29
— call IV— put IVATM ≈ 16.3% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Thu, Oct 29
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 · Thu, Oct 29
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.83
-0.65
765
0.0345
0.10
-0.65
-0.17
0.80
-0.81
766
0.0392
0.12
-0.81
-0.20
0.76
-1.01
767
0.0438
0.13
-1.01
-0.24
0.71
-1.25
768
0.0483
0.14
-1.25
-0.29
0.67
-1.53
769
0.0524
0.15
-1.53
-0.34
0.61
-1.86
770
0.0558
0.16
-1.86
-0.39
0.56
-2.22
771
0.0584
0.16
-2.22
-0.44
0.50
-2.40
772
0.0601
0.16
-2.40
-0.50
0.44
-2.08
773
0.0604
0.16
-2.08
-0.56
0.38
-1.64
774
0.0593
0.15
-1.64
-0.63
0.32
-1.26
775
0.0566
0.14
-1.26
-0.69
0.26
-0.94
776
0.0524
0.13
-0.94
-0.74
0.12
-0.33
779
0.0335
0.08
-0.35
-0.89
0.09
-0.23
780
0.0269
0.07
-0.25
-0.92
0.06
-0.15
781
0.0211
0.05
-0.19
-0.94
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.