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 — 140 — is the max pain price.
Open interest by strike · Fri, Oct 30
■ calls (up)■ puts (down)SMTC 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 ≈ 90.5% · 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
-0.19
110
0.0083
0.03
-0.19
-0.08
0.79
-0.35
120
0.0168
0.05
-0.36
-0.21
0.69
-0.43
125
0.0211
0.06
-0.43
-0.31
0.67
-0.44
126
0.0218
0.07
-0.44
-0.33
0.65
-0.45
127
0.0225
0.07
-0.45
-0.35
0.63
-0.46
128
0.0231
0.07
-0.46
-0.38
0.58
-0.47
130
0.0240
0.07
-0.47
-0.42
0.53
-0.47
132
0.0246
0.07
-0.48
-0.47
0.48
-0.47
134
0.0248
0.07
-0.48
-0.52
0.46
-0.47
135
0.0247
0.07
-0.47
-0.55
0.34
-0.42
140
0.0230
0.07
-0.43
-0.67
0.30
-0.40
142
0.0218
0.06
-0.40
-0.71
0.28
-0.38
143
0.0211
0.06
-0.39
-0.73
0.24
-0.35
145
0.0196
0.06
-0.36
-0.77
0.21
-0.32
147
0.0179
0.05
-0.32
-0.80
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 34 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.