SourcePut open interest divided by call open interest
As ofCboe delayed snapshot Nov 10, 10:48 PM ET
How66 put contracts / 12 call contracts = 5.50 for the 2027-05-21 expiration. Open interest is published once a day, before the open, so it describes the previous session.
Too thin to read: 78 open contracts across 10 strikes. Max pain, walls and gamma print from 100 contracts across 5 strikes.
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.
Too thin to read: 78 open contracts across 10 strikes. Max pain, walls and gamma print from 100 contracts across 5 strikes.
Open interest by strike · Fri, May 21
■ calls (up)■ puts (down)PKX open contracts per strike for Fri, May 21.
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, May 21
Implied volatility by strike · Fri, May 21
— call IV— put IVATM ≈ 41.2% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Greeks by strike · Fri, May 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.89
-0.01
35
0.0115
0.07
-0.01
-0.11
0.80
-0.01
40
0.0177
0.10
-0.01
-0.20
0.69
-0.01
45
0.0232
0.13
-0.01
-0.32
0.56
-0.01
50
0.0262
0.14
-0.01
-0.45
0.44
-0.01
55
0.0261
0.14
-0.01
-0.57
0.33
-0.01
60
0.0238
0.13
-0.01
-0.68
0.25
-0.01
65
0.0205
0.11
-0.01
-0.77
0.19
-0.01
70
0.0171
0.10
-0.01
-0.84
0.12
-0.01
80
0.0116
0.07
-0.00
-0.93
0.07
-0.01
90
0.0079
0.05
not quoted
-0.97
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. 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.