SourcePut open interest divided by call open interest
As ofCboe delayed snapshot Oct 14, 9:36 AM ET
How10 put contracts / 50 call contracts = 0.20 for the 2027-04-16 expiration. Open interest is published once a day, before the open, so it describes the previous session.
Too thin to read: 60 open contracts across 16 strikes. Max pain, walls and gamma print from 100 contracts across 5 strikes.
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.
Too thin to read: 60 open contracts across 16 strikes. Max pain, walls and gamma print from 100 contracts across 5 strikes.
Open interest by strike · Fri, Apr 16
■ calls (up)■ puts (down)ASTN open contracts per strike for Fri, Apr 16.
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, Apr 16
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Apr 16
— call IV— put IVATM ≈ 144.6% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Greeks by strike · Fri, Apr 16
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.81
-0.02
15
0.0102
0.04
-0.02
-0.14
0.80
-0.02
16
0.0106
0.04
-0.02
-0.16
0.78
-0.02
17
0.0110
0.04
-0.02
-0.17
0.73
-0.03
20
0.0120
0.05
-0.02
-0.21
0.71
-0.03
21
0.0123
0.05
-0.02
-0.22
0.65
-0.03
25
0.0132
0.06
-0.02
-0.27
0.64
-0.03
26
0.0134
0.06
-0.02
-0.29
0.62
-0.03
27
0.0135
0.06
-0.02
-0.30
0.61
-0.03
28
0.0136
0.06
-0.02
-0.31
0.60
-0.03
29
0.0138
0.06
-0.02
-0.32
0.58
-0.03
30
0.0138
0.07
-0.02
-0.33
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 11 strikes around the money — all 16 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.