■ 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 — 360 — is the max pain price.
Open interest by strike · Fri, Sep 18
■ calls (up)■ puts (down)SAIA open contracts per strike for Fri, Sep 18.
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 18
■ calls (up)■ puts (down)Today's traded contracts per strike (delayed).
Implied volatility by strike · Fri, Sep 18
— call IV— put IVATM ≈ 40.2% · Quoted strikes only; illiquid wings with junk fits are dropped, not smoothed.
Gamma exposure by strike · Fri, Sep 18
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 18
Call Δ
Call Θ
Strike
Γ
Vega
Put Θ
Put Δ
0.92
-0.13
300
0.0025
0.16
-0.14
-0.08
0.90
-0.15
310
0.0032
0.19
-0.15
-0.10
0.87
-0.17
320
0.0041
0.23
-0.18
-0.13
0.83
-0.19
330
0.0052
0.28
-0.20
-0.17
0.78
-0.22
340
0.0065
0.32
-0.22
-0.23
0.71
-0.24
350
0.0078
0.37
-0.24
-0.29
0.63
-0.26
360
0.0090
0.41
-0.26
-0.38
0.53
-0.27
370
0.0096
0.43
-0.27
-0.47
0.44
-0.27
380
0.0094
0.42
-0.27
-0.57
0.36
-0.26
390
0.0087
0.40
-0.26
-0.66
0.29
-0.24
400
0.0077
0.37
-0.25
-0.73
0.23
-0.23
410
0.0066
0.33
-0.23
-0.78
0.19
-0.21
420
0.0056
0.29
-0.21
-0.82
0.16
-0.19
430
0.0048
0.26
-0.20
-0.86
0.13
-0.18
440
0.0040
0.23
-0.18
-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 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.