SourcePut open interest divided by call open interest
As ofCboe delayed snapshot Nov 4, 4:25 PM ET
How39,687 put contracts / 22,505 call contracts = 1.76 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 4, 4:25 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 8.2% 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 8.2% 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)VLO open contracts per strike for Fri, Dec 18. Showing the 52 largest of 75 strikes by open interest, 98.2% of the total.
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 ≈ 53.6% · 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
0.87
-0.16
300
0.0030
0.27
-0.17
-0.13
0.83
-0.19
310
0.0036
0.32
-0.20
-0.17
0.79
-0.22
320
0.0042
0.37
-0.23
-0.21
0.74
-0.25
330
0.0047
0.41
-0.26
-0.26
0.69
-0.27
340
0.0051
0.45
-0.28
-0.32
0.63
-0.29
350
0.0055
0.48
-0.29
-0.37
0.57
-0.30
360
0.0057
0.50
-0.30
-0.43
0.52
-0.31
370
0.0058
0.50
-0.31
-0.49
0.46
-0.30
380
0.0058
0.50
-0.30
-0.55
0.41
-0.30
390
0.0057
0.49
-0.30
-0.60
0.35
-0.28
400
0.0054
0.47
-0.28
-0.65
0.30
-0.27
410
0.0051
0.44
-0.26
-0.70
0.26
-0.25
420
0.0048
0.41
-0.24
-0.75
0.22
-0.23
430
0.0044
0.38
-0.22
-0.79
0.19
-0.20
440
0.0040
0.34
-0.19
-0.82
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 52 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.