HowThe settle strike with the smallest total payout to option holders for the 2028-01-21 expiration, over 33 strikes carrying 920 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 3, 6:05 AM ET
How665 put contracts / 255 call contracts = 2.61 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 3, 6:05 AM 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, 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.
■ 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 — 37 — is the max pain price.
Open interest by strike · Fri, Jan 21
■ calls (up)■ puts (down)ULTY open contracts per strike for Fri, Jan 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, Jan 21
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Jan 21
— call IV— put IVATM ≈ 55.5% · 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
1.00
-0.04
15
0.0149
0.03
0.00
-0.38
0.69
-0.02
20
0.2311
0.04
not quoted
-0.40
0.46
-0.01
21
0.1449
0.04
not quoted
-0.41
0.34
-0.01
22
0.1057
0.04
not quoted
-0.41
0.26
-0.01
23
0.0750
0.04
not quoted
-0.41
0.21
-0.01
24
0.0562
0.04
not quoted
-0.41
0.17
-0.01
25
0.0443
0.04
not quoted
-0.41
0.14
-0.01
26
0.0356
0.04
not quoted
-0.42
0.13
-0.00
27
0.0298
0.03
not quoted
-0.42
0.11
-0.00
28
0.0252
0.03
not quoted
-0.42
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 10 strikes around the money — all 33 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.