HowThe settle strike with the smallest total payout to option holders for the 2028-01-21 expiration, over 88 strikes carrying 3,056 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, 10:58 PM ET
How1,034 put contracts / 2,022 call contracts = 0.51 for the 2028-01-21 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, 10:58 PM ET
HowOver every strike with open interest for the 2028-01-21 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, 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.
■ 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 — 360 — is the max pain price.
Open interest by strike · Fri, Jan 21
■ calls (up)■ puts (down)OIH open contracts per strike for Fri, Jan 21. Showing the 55 largest of 88 strikes by open interest, 96.9% 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, Jan 21
Implied volatility by strike · Fri, Jan 21
— call IV— put IVATM ≈ 34.2% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Jan 21
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, Jan 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.70
-0.04
320
0.0025
1.27
-0.05
-0.30
0.67
-0.05
330
0.0026
1.33
-0.05
-0.33
0.66
-0.05
335
0.0027
1.35
-0.05
-0.34
0.64
-0.05
340
0.0028
1.37
-0.05
-0.35
0.63
-0.05
345
0.0028
1.41
-0.05
-0.37
0.62
-0.05
350
0.0028
1.42
-0.05
-0.39
0.60
-0.05
355
0.0029
1.44
-0.05
-0.40
0.59
-0.05
360
0.0029
1.45
-0.06
-0.41
0.57
-0.05
365
0.0030
1.46
-0.06
-0.43
0.56
-0.05
370
0.0030
1.47
-0.06
-0.45
0.54
-0.05
375
0.0030
1.48
-0.06
-0.46
0.53
-0.05
380
0.0030
1.49
-0.06
-0.48
0.52
-0.05
385
0.0030
1.49
-0.06
-0.49
0.50
-0.05
390
0.0030
1.49
-0.06
-0.51
0.49
-0.05
395
0.0031
1.49
-0.06
-0.52
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 55 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.