Event risk before this expiration:Jobs report Fri, Nov 6 · CPI release Tue, Nov 10 · Jobs report Fri, Dec 4 · FOMC decision Wed, Dec 9 · CPI release Thu, Dec 10 — macro releases historically overwhelm pinning effects; max pain reads weakest in event weeks.
■ 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, Apr 16
■ calls (up)■ puts (down)SPX open contracts per strike for Fri, Apr 16.
Open-interest change · 2026-10-28 → 2026-10-29
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; 2 strikes were in only one day’s snapshot (each keeps its largest strikes) and are left out. Biggest moves: 600 +29K · 7000 +2K · 8000 +2K · 8300 +412
Volume by strike · Fri, Apr 16
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Apr 16
— call IV— put IVATM ≈ 15.9% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Apr 16
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, Apr 16
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.66
-1.00
7450
0.0004
19.01
-1.00
-0.34
0.65
-1.00
7475
0.0004
19.19
-1.00
-0.35
0.64
-1.00
7500
0.0004
19.37
-1.00
-0.36
0.62
-1.00
7550
0.0004
19.69
-1.00
-0.38
0.61
-0.99
7575
0.0004
19.84
-0.99
-0.39
0.60
-0.99
7600
0.0004
19.98
-0.99
-0.40
0.57
-0.98
7675
0.0005
20.33
-0.98
-0.43
0.56
-0.97
7700
0.0005
20.42
-0.97
-0.44
0.53
-0.96
7750
0.0005
20.55
-0.96
-0.47
0.51
-0.94
7800
0.0005
20.62
-0.94
-0.49
0.46
-0.90
7900
0.0005
20.51
-0.90
-0.54
0.43
-0.88
7950
0.0005
20.32
-0.88
-0.57
0.40
-0.85
8000
0.0005
20.05
-0.85
-0.60
0.38
-0.82
8050
0.0005
19.68
-0.82
-0.63
0.35
-0.78
8100
0.0005
19.21
-0.78
-0.65
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.