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 — 61 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)GBTC 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 ≈ 34.7% · 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
0.92
-0.04
57
0.0338
0.01
-0.04
-0.08
0.89
-0.05
58
0.0456
0.02
-0.05
-0.11
0.85
-0.06
59
0.0610
0.02
-0.06
-0.15
0.82
-0.07
59.5
0.0703
0.02
-0.07
-0.18
0.79
-0.07
60
0.0806
0.03
-0.07
-0.21
0.71
-0.08
61
0.1031
0.03
-0.08
-0.29
0.60
-0.09
62
0.1237
0.03
-0.09
-0.40
0.54
-0.09
62.5
0.1306
0.04
-0.09
-0.47
0.47
-0.09
63
0.1338
0.04
-0.09
-0.53
0.41
-0.08
63.5
0.1323
0.03
-0.09
-0.60
0.34
-0.08
64
0.1262
0.03
-0.08
-0.67
0.28
-0.07
64.5
0.1164
0.03
-0.07
-0.73
0.23
-0.06
65
0.1042
0.03
-0.07
-0.78
0.19
-0.06
65.5
0.0910
0.02
-0.06
-0.82
0.15
-0.05
66
0.0781
0.02
-0.05
-0.86
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 30 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.