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 — 157.5 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)SPCX 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 ≈ 66.3% · 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
0.69
-0.25
138
0.0178
0.10
-0.25
-0.31
0.67
-0.26
139
0.0183
0.10
-0.26
-0.33
0.65
-0.26
140
0.0188
0.11
-0.26
-0.35
0.63
-0.26
141
0.0193
0.11
-0.27
-0.37
0.61
-0.27
142
0.0197
0.11
-0.27
-0.39
0.59
-0.27
143
0.0201
0.11
-0.27
-0.41
0.57
-0.27
144
0.0204
0.11
-0.27
-0.43
0.55
-0.27
145
0.0207
0.11
-0.27
-0.45
0.53
-0.27
146
0.0209
0.11
-0.27
-0.47
0.51
-0.27
147
0.0210
0.11
-0.27
-0.49
0.49
-0.27
148
0.0211
0.11
-0.27
-0.51
0.47
-0.27
149
0.0212
0.11
-0.27
-0.53
0.45
-0.27
150
0.0211
0.11
-0.27
-0.56
0.40
-0.26
152.5
0.0208
0.11
-0.26
-0.61
0.34
-0.24
155
0.0200
0.11
-0.24
-0.66
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.