Event risk before this expiration:FOMC decision Wed, Sep 16 · Jobs report Fri, Oct 2 · CPI release Wed, Oct 14 — 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 — 95 — is the max pain price.
Open interest by strike · Fri, Oct 23
■ calls (up)■ puts (down)BIDU open contracts per strike for Fri, Oct 23.
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, Oct 23
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 23
— call IV— put IVATM ≈ 40.4% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 23
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, Oct 23
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.74
-0.05
85
0.0262
0.10
-0.05
-0.26
0.71
-0.05
86
0.0276
0.11
-0.05
-0.29
0.68
-0.05
87
0.0289
0.11
-0.05
-0.32
0.65
-0.05
88
0.0300
0.12
-0.06
-0.35
0.62
-0.06
89
0.0309
0.12
-0.06
-0.38
0.59
-0.06
90
0.0316
0.12
-0.06
-0.42
0.56
-0.06
91
0.0321
0.12
-0.06
-0.45
0.52
-0.06
92
0.0323
0.12
-0.06
-0.48
0.49
-0.06
93
0.0322
0.12
-0.06
-0.51
0.46
-0.06
94
0.0320
0.12
-0.06
-0.55
0.43
-0.06
95
0.0315
0.12
-0.06
-0.57
0.40
-0.06
96
0.0308
0.12
-0.06
-0.60
0.38
-0.06
97
0.0300
0.12
-0.06
-0.63
0.35
-0.06
98
0.0291
0.12
-0.06
-0.66
0.32
-0.05
99
0.0280
0.11
-0.06
-0.69
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 36 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.