Event risk before this expiration:FOMC decision Wed, Oct 28 — 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 — 22.5 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)S open contracts per strike for Fri, Oct 30.
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 · Fri, Oct 30
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 30
— call IV— put IVATM ≈ 69.1% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 30
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, Oct 30
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.96
-0.02
22
0.0382
0.00
-0.02
-0.04
0.94
-0.03
22.5
0.0552
0.00
-0.03
-0.06
0.91
-0.04
23
0.0787
0.00
-0.04
-0.09
0.87
-0.05
23.5
0.1095
0.01
-0.05
-0.13
0.81
-0.06
24
0.1456
0.01
-0.06
-0.19
0.73
-0.08
24.5
0.1814
0.01
-0.08
-0.27
0.63
-0.09
25
0.2081
0.01
-0.09
-0.37
0.52
-0.10
25.5
0.2185
0.01
-0.10
-0.48
0.41
-0.10
26
0.2110
0.01
-0.10
-0.59
0.32
-0.09
26.5
0.1897
0.01
-0.09
-0.68
0.24
-0.07
27
0.1613
0.01
-0.07
-0.76
0.18
-0.06
27.5
0.1316
0.01
-0.06
-0.82
0.13
-0.05
28
0.1041
0.01
-0.05
-0.87
0.07
-0.03
29
0.0616
0.00
-0.03
-0.93
0.04
-0.02
30
0.0350
0.00
-0.02
-0.96
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 31 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 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.