HowThe settle strike with the smallest total payout to option holders for the 2026-11-20 expiration, over 38 strikes carrying 955 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 4, 11:56 AM ET
How301 put contracts / 654 call contracts = 0.46 for the 2026-11-20 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, 11:56 AM ET
HowOver every strike with open interest for the 2026-11-20 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, Nov 6 · CPI release Tue, Nov 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 — 600 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)CACI open contracts per strike for Fri, Nov 20.
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, Nov 20
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Nov 20
— call IV— put IVATM ≈ 38.0% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Nov 20
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, Nov 20
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.90
-0.33
560
0.0030
0.24
-0.34
-0.10
0.87
-0.38
570
0.0036
0.28
-0.39
-0.13
0.83
-0.42
580
0.0044
0.33
-0.43
-0.17
0.79
-0.48
590
0.0053
0.38
-0.48
-0.21
0.74
-0.53
600
0.0062
0.43
-0.54
-0.27
0.67
-0.57
610
0.0071
0.48
-0.58
-0.33
0.60
-0.60
620
0.0077
0.51
-0.61
-0.41
0.52
-0.62
630
0.0080
0.53
-0.63
-0.49
0.44
-0.62
640
0.0078
0.52
-0.63
-0.56
0.37
-0.60
650
0.0074
0.50
-0.61
-0.64
0.31
-0.57
660
0.0067
0.47
-0.58
-0.70
0.25
-0.54
670
0.0059
0.43
-0.54
-0.75
0.21
-0.50
680
0.0051
0.39
-0.50
-0.80
0.18
-0.46
690
0.0044
0.34
-0.46
-0.83
0.15
-0.42
700
0.0038
0.31
-0.42
-0.86
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 38 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.