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 — 27 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)SIRI 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 ≈ 65.1% · 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
0.95
-0.03
24
0.0464
0.00
-0.03
-0.05
0.92
-0.04
24.5
0.0659
0.00
-0.04
-0.08
0.89
-0.05
25
0.0909
0.01
-0.05
-0.11
0.83
-0.06
25.5
0.1204
0.01
-0.06
-0.17
0.77
-0.08
26
0.1515
0.01
-0.08
-0.23
0.68
-0.09
26.5
0.1794
0.01
-0.09
-0.32
0.59
-0.10
27
0.1986
0.01
-0.10
-0.41
0.49
-0.10
27.5
0.2049
0.01
-0.10
-0.51
0.39
-0.10
28
0.1971
0.01
-0.10
-0.61
0.30
-0.09
28.5
0.1777
0.01
-0.09
-0.70
0.22
-0.07
29
0.1511
0.01
-0.07
-0.78
0.16
-0.06
29.5
0.1222
0.01
-0.06
-0.84
0.11
-0.04
30
0.0949
0.01
-0.04
-0.89
0.08
-0.03
30.5
0.0712
0.00
-0.03
-0.93
0.05
-0.02
31
0.0521
0.00
-0.02
-0.95
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 24 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.