SourcePut open interest divided by call open interest
As ofCboe delayed snapshot Nov 3, 6:07 AM ET
How2,522 put contracts / 4,798 call contracts = 0.53 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 3, 6:07 AM 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.
Max pain is not shown: without its single heaviest strike it moves 14.8% of spot, more than the 5% we allow, so one strike decides it. Walls and gamma still print.
Event risk before this expiration:Jobs report Fri, Nov 6 · CPI release Tue, Nov 10 · 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.
Max pain is not shown: without its single heaviest strike it moves 14.8% of spot, more than the 5% we allow, so one strike decides it. Walls and gamma still print.
Open interest by strike · Fri, Dec 18
■ calls (up)■ puts (down)MSTU 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 ≈ 152.3% · 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
0.80
-0.05
20
0.0183
0.03
-0.05
-0.20
0.78
-0.05
21
0.0198
0.03
-0.05
-0.23
0.75
-0.05
22
0.0212
0.03
-0.05
-0.25
0.72
-0.05
23
0.0226
0.03
-0.05
-0.28
0.70
-0.06
24
0.0238
0.03
-0.06
-0.31
0.67
-0.06
25
0.0248
0.04
-0.06
-0.33
0.64
-0.06
26
0.0257
0.04
-0.06
-0.36
0.62
-0.06
27
0.0265
0.04
-0.06
-0.39
0.59
-0.06
28
0.0271
0.04
-0.06
-0.42
0.56
-0.06
29
0.0276
0.04
-0.06
-0.44
0.54
-0.06
30
0.0279
0.04
-0.06
-0.47
0.51
-0.06
31
0.0280
0.04
-0.06
-0.49
0.49
-0.06
32
0.0281
0.04
-0.06
-0.52
0.46
-0.06
33
0.0280
0.04
-0.06
-0.54
0.44
-0.06
34
0.0279
0.04
-0.06
-0.57
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 45 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.