■ 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 — 7700 — is the max pain price.
Open interest by strike · Mon, Sep 21
■ calls (up)■ puts (down)SPX 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: 7635 +529 · 6700 +442 · 7590 +396 · 7700 +262
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 ≈ 11.2% · 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
0.68
-2.88
7590
0.0023
4.57
-2.88
-0.32
0.66
-2.91
7600
0.0024
4.67
-2.91
-0.34
0.60
-2.95
7625
0.0026
4.90
-2.95
-0.40
0.59
-2.95
7630
0.0026
4.93
-2.95
-0.41
0.57
-2.94
7635
0.0027
4.96
-2.94
-0.42
0.56
-2.94
7640
0.0027
4.99
-2.94
-0.44
0.54
-2.91
7650
0.0028
5.03
-2.91
-0.47
0.51
-2.88
7660
0.0028
5.05
-2.88
-0.49
0.48
-2.82
7670
0.0029
5.04
-2.82
-0.52
0.46
-2.79
7675
0.0029
5.03
-2.79
-0.54
0.42
-2.68
7690
0.0029
4.95
-2.68
-0.58
0.39
-2.58
7700
0.0029
4.87
-2.58
-0.61
0.36
-2.47
7710
0.0029
4.75
-2.47
-0.64
0.33
-2.35
7720
0.0028
4.61
-2.35
-0.67
0.31
-2.29
7725
0.0028
4.52
-2.29
-0.69
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.