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 — 41.5 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)KTOS 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 ≈ 53.8% · 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
0.89
-0.07
37
0.0632
0.01
-0.07
-0.11
0.86
-0.08
37.5
0.0778
0.01
-0.08
-0.14
0.82
-0.09
38
0.0938
0.01
-0.09
-0.18
0.77
-0.11
38.5
0.1103
0.01
-0.11
-0.23
0.71
-0.12
39
0.1260
0.01
-0.12
-0.29
0.65
-0.13
39.5
0.1392
0.02
-0.13
-0.36
0.57
-0.14
40
0.1483
0.02
-0.14
-0.43
0.50
-0.14
40.5
0.1520
0.02
-0.14
-0.50
0.42
-0.14
41
0.1497
0.02
-0.14
-0.58
0.35
-0.13
41.5
0.1419
0.02
-0.13
-0.65
0.29
-0.12
42
0.1297
0.01
-0.11
-0.71
0.23
-0.10
42.5
0.1148
0.01
-0.10
-0.77
0.18
-0.09
43
0.0987
0.01
-0.09
-0.82
0.14
-0.07
43.5
0.0830
0.01
-0.07
-0.86
0.11
-0.06
44
0.0685
0.01
-0.06
-0.89
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 46 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.