SourcePut open interest divided by call open interest
As ofCboe delayed snapshot Nov 10, 7:01 PM ET
How385 put contracts / 505 call contracts = 0.76 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, 7:01 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.
Max pain is not shown: without its single heaviest strike it moves 11.7% 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, 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 11.7% 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)RS 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 ≈ 26.4% · 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
0.93
-0.09
360
0.0026
0.19
-0.09
-0.07
0.91
-0.10
370
0.0034
0.23
-0.11
-0.09
0.88
-0.12
380
0.0044
0.28
-0.12
-0.13
0.83
-0.14
390
0.0057
0.34
-0.14
-0.17
0.78
-0.15
400
0.0073
0.41
-0.16
-0.23
0.70
-0.17
410
0.0090
0.48
-0.18
-0.30
0.61
-0.18
420
0.0105
0.53
-0.19
-0.40
0.50
-0.18
430
0.0113
0.55
-0.19
-0.51
0.39
-0.17
440
0.0111
0.53
-0.18
-0.63
0.29
-0.15
450
0.0098
0.47
-0.16
-0.73
0.21
-0.13
460
0.0081
0.40
-0.13
-0.82
0.15
-0.11
470
0.0064
0.32
-0.10
-0.88
0.07
-0.07
490
0.0036
0.20
-0.06
-0.95
0.05
-0.05
500
0.0027
0.15
-0.04
-0.97
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 14 strikes around the money — all 39 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.