■ 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 — 18 — is the max pain price.
Open interest by strike · Fri, Aug 28
■ calls (up)■ puts (down)BILI open contracts per strike for Fri, Aug 28.
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, Aug 28
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Aug 28
— call IV— put IVATM ≈ 58.6% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Aug 28
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, Aug 28
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.92
-0.01
14
0.0515
0.01
-0.01
-0.08
0.90
-0.01
14.5
0.0666
0.01
-0.01
-0.10
0.88
-0.02
15
0.0872
0.01
-0.02
-0.13
0.83
-0.02
15.5
0.1138
0.01
-0.02
-0.17
0.77
-0.02
16
0.1433
0.01
-0.02
-0.23
0.69
-0.03
16.5
0.1697
0.01
-0.03
-0.31
0.60
-0.03
17
0.1860
0.01
-0.03
-0.41
0.50
-0.03
17.5
0.1886
0.01
-0.03
-0.50
0.41
-0.03
18
0.1790
0.01
-0.03
-0.59
0.34
-0.03
18.5
0.1625
0.01
-0.03
-0.66
0.28
-0.03
19
0.1435
0.01
-0.03
-0.73
0.22
-0.03
19.5
0.1245
0.01
-0.03
-0.78
0.18
-0.02
20
0.1063
0.01
-0.02
-0.83
0.14
-0.02
20.5
0.0893
0.01
-0.02
-0.86
0.11
-0.02
21
0.0740
0.01
-0.02
-0.90
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 24 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.
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.