■ 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 · Fri, Sep 18
■ calls (up)■ puts (down)SPY open contracts per strike for Fri, Sep 18.
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: 750 +121K · 730 +65K · 740 +40K · 736 +26K
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 ≈ 11.6% · 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
0.93
-0.18
739
0.0078
0.16
-0.22
-0.10
0.92
-0.19
740
0.0083
0.16
-0.23
-0.10
0.90
-0.22
743
0.0102
0.19
-0.26
-0.13
0.89
-0.24
745
0.0116
0.20
-0.27
-0.14
0.83
-0.29
750
0.0163
0.26
-0.32
-0.20
0.76
-0.34
755
0.0223
0.34
-0.37
-0.29
0.64
-0.38
760
0.0291
0.38
-0.38
-0.41
0.49
-0.37
765
0.0342
0.41
-0.35
-0.57
0.31
-0.30
770
0.0328
0.37
-0.27
-0.74
0.16
-0.19
775
0.0236
0.27
-0.15
-0.88
0.08
-0.10
779
0.0146
0.17
-0.08
-0.94
0.07
-0.09
780
0.0126
0.14
-0.07
-0.95
0.02
-0.04
785
0.0055
0.07
-0.03
-0.98
0.01
-0.02
790
0.0027
0.04
-0.01
-0.99
0.01
-0.01
800
0.0012
0.02
-0.01
-1.00
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.