HowThe settle strike with the smallest total payout to option holders for the 2026-12-18 expiration, over 12 strikes carrying 179 open contracts. Open interest is published once a day, before the open, so it describes the previous session.
SourcePut open interest divided by call open interest
As ofCboe delayed snapshot Nov 10, 7:29 PM ET
How26 put contracts / 153 call contracts = 0.17 for the 2026-12-18 expiration. Open interest is published once a day, before the open, so it describes the previous session.
SourceNet gamma exposure from Cboe greeks and open interest
As ofCboe delayed snapshot Nov 10, 7:29 PM ET
HowOver every strike with open interest for the 2026-12-18 expiration: (call gamma × call OI minus put gamma × put OI) × 100 × spot² × 1%, summed. Calls count as positive and puts as negative, a convention about who holds the other side, not a measurement.
Event risk before this expiration:Jobs report Fri, Dec 4 · FOMC decision Wed, Dec 9 · CPI release Thu, Dec 10 — 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 — 260 — is the max pain price.
Open interest by strike · Fri, Dec 18
■ calls (up)■ puts (down)R open contracts per strike for Fri, Dec 18.
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, Dec 18
Implied volatility by strike · Fri, Dec 18
— call IV— put IVATM ≈ 31.1% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Dec 18
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, Dec 18
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.97
-0.03
220
0.0019
0.06
-0.04
-0.04
0.95
-0.05
230
0.0031
0.09
-0.05
-0.06
0.92
-0.07
240
0.0049
0.14
-0.07
-0.09
0.86
-0.10
250
0.0072
0.20
-0.09
-0.14
0.78
-0.12
260
0.0099
0.26
-0.12
-0.22
0.67
-0.14
270
0.0126
0.33
-0.14
-0.33
0.54
-0.14
280
0.0144
0.36
-0.14
-0.47
0.39
-0.14
290
0.0142
0.35
-0.14
-0.61
0.27
-0.12
300
0.0122
0.30
-0.12
-0.74
0.17
-0.09
310
0.0093
0.23
-0.09
-0.84
0.11
-0.07
320
0.0066
0.17
-0.06
-0.90
0.07
-0.05
330
0.0045
0.12
-0.04
-0.94
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. 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.
Max pain, walls and gamma print only when an expiration holds at least 100 open contracts across 5 strikes, and max pain also needs to stay within 5% of spot when its single heaviest strike is removed. Below that the expiration reads as thin rather than printing a level one trade could move.
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.