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 — 51 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)CRSP 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 ≈ 44.4% · 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
0.98
-0.01
42
0.0105
0.00
-0.01
-0.01
0.97
-0.02
43
0.0184
0.00
-0.02
-0.03
0.95
-0.04
44
0.0310
0.01
-0.04
-0.05
0.91
-0.06
45
0.0494
0.01
-0.06
-0.09
0.85
-0.09
46
0.0733
0.01
-0.09
-0.15
0.76
-0.12
47
0.0992
0.02
-0.12
-0.24
0.65
-0.15
48
0.1206
0.02
-0.15
-0.35
0.53
-0.16
49
0.1305
0.02
-0.16
-0.48
0.40
-0.15
50
0.1260
0.02
-0.16
-0.60
0.28
-0.13
51
0.1097
0.02
-0.14
-0.72
0.19
-0.11
52
0.0874
0.01
-0.11
-0.81
0.13
-0.08
53
0.0650
0.01
-0.08
-0.88
0.08
-0.05
54
0.0459
0.01
-0.05
-0.92
0.05
-0.04
55
0.0312
0.01
-0.04
-0.95
0.03
-0.02
56
0.0206
0.00
-0.02
-0.97
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 29 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.