■ 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 — 7470 — is the max pain price.
Open interest by strike · Wed, Jul 29
■ calls (up)■ puts (down)SPX open contracts per strike for Wed, Jul 29.
Open-interest change — building vs unwinding
Needs two observed snapshot days for this expiration — the comparison appears automatically once the next weekday snapshot lands. We diff real observations only; nothing is estimated.
Volume by strike · Wed, Jul 29
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Wed, Jul 29
— call IV— put IVATM ≈ 22.1% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Wed, Jul 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 · Wed, Jul 29
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.96
-1.53
7300
0.0010
0.33
-1.55
-0.04
0.95
-1.93
7310
0.0012
0.39
-1.95
-0.05
0.94
-2.35
7325
0.0014
0.45
-2.77
-0.07
0.89
-4.45
7350
0.0021
0.67
-4.70
-0.11
0.81
-8.45
7385
0.0033
0.96
-9.36
-0.20
0.80
-9.35
7390
0.0035
1.01
-10.23
-0.21
0.76
-11.25
7400
0.0039
1.10
-12.23
-0.25
0.68
-16.15
7420
0.0046
1.26
-17.10
-0.32
0.59
-22.35
7440
0.0052
1.37
-23.30
-0.41
0.54
-25.95
7450
0.0055
1.40
-26.90
-0.46
0.39
-18.60
7475
0.0057
1.35
-19.55
-0.60
0.30
-12.10
7490
0.0055
1.23
-13.05
-0.69
0.24
-8.54
7500
0.0051
1.11
-9.35
-0.75
0.11
-2.75
7525
0.0034
0.68
-3.05
-0.89
0.09
-2.05
7530
0.0029
0.58
-2.75
-0.90
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
History starts accruing now: first snapshot taken 2026-07-28. We chart only days we actually observed — check back as the record builds. The measured hit-rate across all tickers lives on the accuracy ledger.
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.