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 — 217.5 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)PGR 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 ≈ 23.4% · 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
-0.07
210
0.0081
0.03
-0.07
-0.04
0.94
-0.08
212.5
0.0112
0.04
-0.09
-0.06
0.92
-0.11
215
0.0154
0.05
-0.11
-0.09
0.88
-0.13
217.5
0.0211
0.07
-0.14
-0.12
0.83
-0.17
220
0.0282
0.08
-0.17
-0.17
0.75
-0.20
222.5
0.0363
0.10
-0.20
-0.25
0.66
-0.22
225
0.0440
0.12
-0.23
-0.34
0.54
-0.24
227.5
0.0488
0.13
-0.24
-0.46
0.42
-0.23
230
0.0485
0.12
-0.23
-0.59
0.31
-0.21
232.5
0.0433
0.11
-0.21
-0.70
0.22
-0.17
235
0.0354
0.09
-0.18
-0.79
0.15
-0.14
237.5
0.0272
0.07
-0.14
-0.86
0.10
-0.11
240
0.0202
0.06
-0.11
-0.91
0.05
-0.07
245
0.0107
0.03
-0.06
-0.96
0.03
-0.04
250
0.0058
0.02
-0.04
-0.98
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.