■ 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 — 7500 — is the max pain price.
Open interest by strike · Fri, Sep 18
■ calls (up)■ puts (down)SPX 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: 7530 +18K · 7765 −18K · 7600 −5K · 7000 +4K
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 ≈ 12.2% · 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
0.80
-3.27
7530
0.0018
3.04
-3.27
-0.20
0.77
-3.41
7545
0.0019
3.23
-3.41
-0.23
0.77
-3.46
7550
0.0020
3.29
-3.46
-0.23
0.72
-3.66
7575
0.0022
3.59
-3.66
-0.28
0.69
-3.77
7590
0.0024
3.76
-3.77
-0.31
0.67
-3.82
7600
0.0025
3.86
-3.82
-0.33
0.66
-3.85
7605
0.0026
3.91
-3.85
-0.34
0.54
-3.87
7650
0.0030
4.20
-3.87
-0.46
0.46
-3.69
7675
0.0032
4.20
-3.69
-0.54
0.44
-3.64
7680
0.0032
4.18
-3.64
-0.56
0.43
-3.58
7685
0.0032
4.15
-3.58
-0.57
0.41
-3.52
7690
0.0032
4.12
-3.52
-0.59
0.39
-3.45
7695
0.0032
4.08
-3.45
-0.61
0.38
-3.37
7700
0.0032
4.03
-3.37
-0.62
0.31
-3.02
7720
0.0030
3.77
-3.02
-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.