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 — 17 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)GLXY 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 ≈ 123.6% · 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
0.94
-0.03
11
0.0345
0.00
-0.03
-0.06
0.92
-0.03
11.5
0.0441
0.00
-0.03
-0.08
0.90
-0.04
12
0.0559
0.00
-0.04
-0.10
0.83
-0.05
13
0.0861
0.01
-0.05
-0.17
0.78
-0.05
13.5
0.1033
0.01
-0.05
-0.22
0.72
-0.06
14
0.1199
0.01
-0.06
-0.28
0.66
-0.07
14.5
0.1337
0.01
-0.07
-0.35
0.58
-0.07
15
0.1428
0.01
-0.07
-0.42
0.51
-0.07
15.5
0.1462
0.01
-0.07
-0.49
0.44
-0.07
16
0.1440
0.01
-0.07
-0.56
0.38
-0.07
16.5
0.1373
0.01
-0.07
-0.63
0.32
-0.06
17
0.1274
0.01
-0.06
-0.69
0.27
-0.06
17.5
0.1159
0.01
-0.06
-0.74
0.23
-0.05
18
0.1038
0.01
-0.05
-0.78
0.19
-0.05
18.5
0.0921
0.01
-0.05
-0.81
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 44 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.