SourcePut open interest divided by call open interest
As ofCboe delayed snapshot Nov 10, 6:26 PM ET
How26,703 put contracts / 27,008 call contracts = 0.99 for the 2027-02-19 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, 6:26 PM ET
HowOver every strike with open interest for the 2027-02-19 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.
Max pain is not shown: without its single heaviest strike it moves 35.6% of spot, more than the 5% we allow, so one strike decides it. Walls and gamma still print.
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.
Max pain is not shown: without its single heaviest strike it moves 35.6% of spot, more than the 5% we allow, so one strike decides it. Walls and gamma still print.
Open interest by strike · Fri, Feb 19
■ calls (up)■ puts (down)GLW open contracts per strike for Fri, Feb 19.
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, Feb 19
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Feb 19
— call IV— put IVATM ≈ 61.9% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Feb 19
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, Feb 19
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.90
-0.03
75
0.0041
0.10
-0.03
-0.10
0.87
-0.04
80
0.0051
0.12
-0.04
-0.13
0.84
-0.04
85
0.0062
0.14
-0.05
-0.16
0.80
-0.05
90
0.0073
0.17
-0.05
-0.20
0.75
-0.06
95
0.0083
0.19
-0.06
-0.25
0.70
-0.06
100
0.0092
0.20
-0.06
-0.30
0.65
-0.06
105
0.0100
0.22
-0.07
-0.35
0.60
-0.07
110
0.0106
0.23
-0.07
-0.40
0.55
-0.07
115
0.0110
0.23
-0.07
-0.46
0.49
-0.07
120
0.0111
0.23
-0.07
-0.51
0.44
-0.07
125
0.0111
0.23
-0.07
-0.57
0.39
-0.07
130
0.0108
0.23
-0.07
-0.62
0.35
-0.06
135
0.0104
0.22
-0.06
-0.67
0.30
-0.06
140
0.0099
0.21
-0.06
-0.71
0.27
-0.06
145
0.0093
0.19
-0.05
-0.75
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 47 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.