Event risk before this expiration:Jobs report Fri, Oct 2 · CPI release Wed, Oct 14 — 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 — 180 — is the max pain price.
Open interest by strike · Fri, Oct 16
■ calls (up)■ puts (down)SPXC open contracts per strike for Fri, Oct 16.
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 16
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 16
— call IV— put IVATM ≈ 38.1% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 16
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 16
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.98
-0.02
135
0.0020
0.02
-0.02
-0.02
0.88
-0.08
155
0.0117
0.09
-0.08
-0.12
0.81
-0.11
160
0.0162
0.11
-0.11
-0.19
0.72
-0.13
165
0.0208
0.14
-0.13
-0.29
0.60
-0.15
170
0.0243
0.16
-0.15
-0.40
0.48
-0.15
175
0.0253
0.17
-0.15
-0.53
0.36
-0.14
180
0.0238
0.15
-0.14
-0.65
0.25
-0.12
185
0.0203
0.13
-0.12
-0.76
0.17
-0.10
190
0.0160
0.11
-0.10
-0.84
0.11
-0.07
195
0.0119
0.08
-0.08
-0.90
0.07
-0.05
200
0.0084
0.06
-0.06
-0.94
0.03
-0.03
210
0.0039
0.03
-0.02
-0.99
0.01
-0.01
220
0.0017
0.01
-0.00
-1.00
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 13 strikes around the money — all 14 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.