HowThe settle strike with the smallest total payout to option holders for the 2026-11-20 expiration, over 74 strikes carrying 79,043 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, 7:43 PM ET
How55,066 put contracts / 23,977 call contracts = 2.30 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 10, 7:43 PM 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.
■ 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 — 154 — is the max pain price.
Open interest by strike · Fri, Nov 20
■ calls (up)■ puts (down)XBI open contracts per strike for Fri, Nov 20. Showing the 50 largest of 74 strikes by open interest, 98.5% 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, Nov 20
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Nov 20
— call IV— put IVATM ≈ 37.8% · 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
0.75
-0.16
149
0.0324
0.08
-0.16
-0.25
0.71
-0.17
150
0.0348
0.09
-0.17
-0.29
0.68
-0.17
151
0.0371
0.09
-0.17
-0.32
0.64
-0.18
152
0.0390
0.10
-0.18
-0.36
0.62
-0.18
152.5
0.0399
0.10
-0.18
-0.38
0.60
-0.18
153
0.0407
0.10
-0.19
-0.40
0.56
-0.19
154
0.0419
0.10
-0.19
-0.44
0.52
-0.19
155
0.0426
0.10
-0.19
-0.48
0.47
-0.19
156
0.0429
0.10
-0.19
-0.53
0.43
-0.18
157
0.0425
0.10
-0.18
-0.57
0.39
-0.18
158
0.0417
0.10
-0.18
-0.61
0.35
-0.17
159
0.0403
0.10
-0.17
-0.65
0.31
-0.16
160
0.0386
0.09
-0.16
-0.69
0.28
-0.15
161
0.0364
0.09
-0.15
-0.73
0.24
-0.14
162
0.0340
0.08
-0.14
-0.76
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 50 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.