HowThe settle strike with the smallest total payout to option holders for the 2027-05-21 expiration, over 25 strikes carrying 3,265 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 9, 9:44 PM ET
How1,227 put contracts / 2,038 call contracts = 0.60 for the 2027-05-21 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 9, 9:44 PM ET
HowOver every strike with open interest for the 2027-05-21 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 — 60 — is the max pain price.
Open interest by strike · Fri, May 21
■ calls (up)■ puts (down)EDV 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
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, May 21
— call IV— put IVATM ≈ 17.7% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, May 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, May 21
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.85
-0.00
53
0.0340
0.10
-0.01
-0.18
0.82
-0.01
54
0.0383
0.11
-0.01
-0.22
0.77
-0.01
55
0.0424
0.13
-0.01
-0.26
0.73
-0.01
56
0.0463
0.14
-0.01
-0.31
0.68
-0.01
57
0.0498
0.15
-0.01
-0.35
0.63
-0.01
58
0.0524
0.16
-0.01
-0.41
0.57
-0.01
59
0.0539
0.16
-0.01
-0.46
0.52
-0.01
60
0.0543
0.17
-0.01
-0.51
0.47
-0.01
61
0.0536
0.17
-0.01
-0.56
0.42
-0.01
62
0.0521
0.16
-0.01
-0.61
0.37
-0.01
63
0.0497
0.16
-0.01
-0.66
0.33
-0.01
64
0.0469
0.15
-0.01
-0.70
0.29
-0.01
65
0.0438
0.14
-0.01
-0.74
0.26
-0.01
66
0.0405
0.14
-0.01
-0.77
0.23
-0.01
67
0.0372
0.13
-0.01
-0.80
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 25 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.