SourcePut open interest divided by call open interest
As ofCboe delayed snapshot Nov 10, 10:02 PM ET
How3 put contracts / 9 call contracts = 0.33 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: 12 open contracts across 7 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: 12 open contracts across 7 strikes. Max pain, walls and gamma print from 100 contracts across 5 strikes.
Open interest by strike · Fri, Apr 16
■ calls (up)■ puts (down)SBIO 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
Implied volatility by strike · Fri, Apr 16
— call IV— put IVATM ≈ 32.1% · 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
0.77
-0.01
50
0.0205
0.11
-0.01
-0.23
0.65
-0.01
55
0.0299
0.14
-0.01
-0.35
0.43
-0.01
62
0.0319
0.15
-0.01
-0.58
0.41
-0.01
63
0.0307
0.15
-0.01
-0.61
0.33
-0.01
67
0.0257
0.14
-0.01
-0.69
0.31
-0.01
68
0.0245
0.13
-0.01
-0.70
0.24
-0.02
75
0.0183
0.12
-0.01
-0.78
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.