HowThe settle strike with the smallest total payout to option holders for the 2026-12-18 expiration, over 51 strikes carrying 313 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, 9:30 PM ET
How194 put contracts / 119 call contracts = 1.63 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, 9:30 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 — 210 — is the max pain price.
Open interest by strike · Fri, Dec 18
■ calls (up)■ puts (down)MRNX 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
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Dec 18
— call IV— put IVATM ≈ 171.7% · 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
0.75
-0.48
160
0.0028
0.20
-0.47
-0.25
0.73
-0.49
165
0.0029
0.21
-0.49
-0.26
0.69
-0.52
175
0.0031
0.22
-0.52
-0.30
0.68
-0.53
180
0.0031
0.23
-0.53
-0.32
0.66
-0.55
185
0.0032
0.23
-0.54
-0.33
0.64
-0.55
190
0.0033
0.24
-0.55
-0.35
0.63
-0.56
195
0.0033
0.24
-0.56
-0.37
0.61
-0.57
200
0.0034
0.25
-0.56
-0.38
0.59
-0.58
205
0.0034
0.25
-0.57
-0.40
0.57
-0.58
210
0.0034
0.25
-0.57
-0.42
0.56
-0.58
215
0.0035
0.25
-0.58
-0.43
0.54
-0.59
220
0.0035
0.26
-0.58
-0.45
0.53
-0.59
225
0.0035
0.26
-0.58
-0.47
0.49
-0.59
235
0.0035
0.26
-0.58
-0.50
0.47
-0.58
245
0.0035
0.26
-0.58
-0.53
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 51 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.
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.