Event risk before this expiration:FOMC decision Wed, Sep 16 · Jobs report Fri, Oct 2 — 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 9
■ calls (up)■ puts (down)BIDU open contracts per strike for Fri, Oct 9.
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 9
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Oct 9
— call IV— put IVATM ≈ 40.6% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Oct 9
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 9
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.78
-0.05
85
0.0304
0.07
-0.05
-0.22
0.75
-0.06
86
0.0328
0.08
-0.06
-0.26
0.71
-0.06
87
0.0350
0.09
-0.06
-0.29
0.67
-0.06
88
0.0368
0.09
-0.06
-0.33
0.63
-0.07
89
0.0383
0.10
-0.07
-0.37
0.59
-0.07
90
0.0394
0.10
-0.07
-0.41
0.55
-0.07
91
0.0400
0.10
-0.07
-0.45
0.51
-0.07
92
0.0402
0.10
-0.07
-0.49
0.47
-0.07
93
0.0399
0.10
-0.07
-0.53
0.44
-0.07
94
0.0393
0.10
-0.07
-0.57
0.40
-0.07
95
0.0383
0.10
-0.07
-0.61
0.36
-0.07
96
0.0370
0.10
-0.07
-0.64
0.33
-0.07
97
0.0354
0.09
-0.07
-0.68
0.30
-0.06
98
0.0337
0.09
-0.07
-0.71
0.27
-0.06
99
0.0319
0.08
-0.06
-0.74
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 37 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.