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 — 165 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)MMM 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 ≈ 32.0% · 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
-0.04
155
0.0090
0.03
-0.04
-0.04
0.94
-0.06
157.5
0.0127
0.04
-0.06
-0.06
0.91
-0.07
160
0.0182
0.05
-0.08
-0.10
0.85
-0.10
162.5
0.0256
0.07
-0.10
-0.15
0.78
-0.13
165
0.0333
0.09
-0.13
-0.22
0.69
-0.16
167.5
0.0402
0.10
-0.16
-0.32
0.58
-0.17
170
0.0449
0.11
-0.17
-0.43
0.46
-0.17
172.5
0.0462
0.11
-0.17
-0.54
0.35
-0.16
175
0.0436
0.10
-0.16
-0.66
0.25
-0.14
177.5
0.0376
0.09
-0.14
-0.76
0.17
-0.11
180
0.0299
0.07
-0.11
-0.84
0.11
-0.08
182.5
0.0222
0.06
-0.08
-0.90
0.08
-0.06
185
0.0161
0.04
-0.06
-0.93
0.06
-0.05
187.5
0.0120
0.03
-0.05
-0.95
0.05
-0.05
190
0.0094
0.03
-0.05
-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 28 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.