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 — 150 — is the max pain price.
Open interest by strike · Wed, Oct 28
■ calls (up)■ puts (down)SPCX open contracts per strike for Wed, Oct 28.
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 · Wed, Oct 28
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Wed, Oct 28
— call IV— put IVATM ≈ 67.8% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Wed, Oct 28
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 · Wed, Oct 28
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.69
-0.28
138
0.0185
0.09
-0.28
-0.31
0.68
-0.29
139
0.0191
0.10
-0.29
-0.33
0.66
-0.29
140
0.0196
0.10
-0.29
-0.34
0.64
-0.29
141
0.0202
0.10
-0.30
-0.37
0.61
-0.30
142
0.0206
0.10
-0.30
-0.39
0.59
-0.30
143
0.0210
0.10
-0.30
-0.41
0.57
-0.30
144
0.0214
0.10
-0.30
-0.43
0.55
-0.30
145
0.0217
0.10
-0.31
-0.45
0.53
-0.30
146
0.0219
0.10
-0.31
-0.47
0.51
-0.30
147
0.0221
0.11
-0.30
-0.49
0.48
-0.30
148
0.0222
0.11
-0.30
-0.52
0.46
-0.30
149
0.0222
0.10
-0.30
-0.54
0.44
-0.30
150
0.0221
0.10
-0.30
-0.56
0.39
-0.28
152.5
0.0217
0.10
-0.28
-0.61
0.33
-0.27
155
0.0208
0.10
-0.27
-0.67
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 49 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.