■ 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 — 465 — is the max pain price.
Open interest by strike · Fri, Sep 11
■ calls (up)■ puts (down)WDC open contracts per strike for Fri, Sep 11.
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, Sep 11
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Sep 11
— call IV— put IVATM ≈ 74.3% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Sep 11
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, Sep 11
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.96
-0.39
425
0.0042
0.02
-0.40
-0.04
0.94
-0.56
430
0.0058
0.03
-0.57
-0.06
0.91
-0.83
435
0.0079
0.04
-0.84
-0.09
0.87
-1.25
440
0.0108
0.05
-1.26
-0.13
0.81
-1.94
445
0.0142
0.07
-1.94
-0.19
0.74
-2.99
450
0.0177
0.08
-2.99
-0.26
0.64
-4.52
455
0.0206
0.09
-4.52
-0.36
0.59
-5.39
457.5
0.0215
0.10
-5.39
-0.41
0.53
-5.98
460
0.0220
0.10
-5.98
-0.47
0.42
-5.38
465
0.0217
0.10
-5.38
-0.58
0.32
-3.71
470
0.0198
0.09
-3.71
-0.68
0.28
-3.02
472.5
0.0184
0.08
-3.02
-0.72
0.23
-2.44
475
0.0168
0.07
-2.44
-0.77
0.16
-1.56
480
0.0134
0.06
-1.57
-0.84
0.11
-0.97
485
0.0101
0.05
-0.99
-0.89
Quoted contract greeks from the delayed feed (not modeled here); the highlighted row is nearest to spot. Showing 15 strikes around the money — all 60 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.