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Gentex Corporation Common Stock GNTX

CONSUMER CYCLICAL · AUTO PARTS
i

Market dataready · fetched 2026-11-11T15:45:23.627Z

Delta surfaceAlpaca · derived absolute-delta buckets · 2026-12-18

Calculation methodology

Options historyIV: ThetaData historical Greeks, equal-weight mean of call/put 50-delta IV across the next four listed Friday-cycle expirations, including holiday shifts verified against ThetaData’s market calendar. Missing inputs leave gaps. Skew: equal-weight mean of put minus call IV across those four expirations. IV-implied move history: mean of each expiration’s average call/put IV multiplied by the square root of remaining calendar days divided by 365.25; percentage of spot, not a quoted straddle premium.

History data

PriceAlpaca · sip · 2026-11-11T15:45:14.527402759Z

FundamentalsAlpha Vantage · ready · quarter 2026-09-30 · fetched 2026-11-11T15:45:22.519544+00:00

Share price$19.29
1D-0.7%
$19.23$19.28$19.33$19.38$19.435:30 AM6:30 AM9:00 AM1:00 PMGNTX
Sold putSold call

Gentex Corporation Common Stock options

Live interpolated GNTX call and put midpoint premiums by absolute delta.Gentex Corporation Common Stock$0.56$1.05$1.53$2.02$2.50$-0.12$0.19$0.50$0.81$1.1220Δ25Δ30Δ35Δ40Δ45Δ50Δ55Δ60Δ65Δ70Δ75Δ80Δ20Δ C/P unavailable: no unambiguous, price-consistent delta bracketC/P —25Δ P unavailable: no unambiguous, price-consistent delta bracketP —30Δ P unavailable: no unambiguous, price-consistent delta bracketP —35Δ P unavailable: no unambiguous, price-consistent delta bracketP —40Δ P unavailable: no unambiguous, price-consistent delta bracketP —45Δ P unavailable: no unambiguous, price-consistent delta bracketP —50Δ P unavailable: no unambiguous, price-consistent delta bracketP —55Δ P unavailable: no unambiguous, price-consistent delta bracketP —60Δ P unavailable: no unambiguous, price-consistent delta bracketP —65Δ P unavailable: no unambiguous, price-consistent delta bracketP —70Δ P unavailable: no unambiguous, price-consistent delta bracketP —75Δ P unavailable: no unambiguous, price-consistent delta bracketP —80Δ C/P unavailable: no unambiguous, price-consistent delta bracketC/P —OPTION PRICEGNTX PRICE$0.62$0.79$0.97$1.14$1.31$1.49$1.66$1.84$2.01$2.19$2.36
Puts——
Calls——
Skew——
Implied move——
Tilt——
Table
Values and derived Greeks for the plotted delta buckets
DeltaCallsPuts
Pseudo strikeIVB/E movePseudo strikeIVB/E move
20Δ
25Δ21.3639.2%13.9%
30Δ20.9840.5%12.9%
35Δ20.6041.9%11.8%
40Δ20.2143.2%10.7%
45Δ19.8344.6%9.6%
50Δ19.4545.9%8.5%
55Δ19.0647.3%7.5%
60Δ18.6848.6%6.4%
65Δ18.3049.9%5.3%
70Δ17.9251.3%4.2%
75Δ17.5352.6%3.1%
80Δ

20Δ

Calls
Pseudo strike
IV
B/E move
Puts
Pseudo strike
IV
B/E move

25Δ

Calls
Pseudo strike
21.36
IV
39.2%
B/E move
13.9%
Puts
Pseudo strike
IV
B/E move

30Δ

Calls
Pseudo strike
20.98
IV
40.5%
B/E move
12.9%
Puts
Pseudo strike
IV
B/E move

35Δ

Calls
Pseudo strike
20.60
IV
41.9%
B/E move
11.8%
Puts
Pseudo strike
IV
B/E move

40Δ

Calls
Pseudo strike
20.21
IV
43.2%
B/E move
10.7%
Puts
Pseudo strike
IV
B/E move

45Δ

Calls
Pseudo strike
19.83
IV
44.6%
B/E move
9.6%
Puts
Pseudo strike
IV
B/E move

50Δ

Calls
Pseudo strike
19.45
IV
45.9%
B/E move
8.5%
Puts
Pseudo strike
IV
B/E move

55Δ

Calls
Pseudo strike
19.06
IV
47.3%
B/E move
7.5%
Puts
Pseudo strike
IV
B/E move

60Δ

Calls
Pseudo strike
18.68
IV
48.6%
B/E move
6.4%
Puts
Pseudo strike
IV
B/E move

65Δ

Calls
Pseudo strike
18.30
IV
49.9%
B/E move
5.3%
Puts
Pseudo strike
IV
B/E move

70Δ

Calls
Pseudo strike
17.92
IV
51.3%
B/E move
4.2%
Puts
Pseudo strike
IV
B/E move

75Δ

Calls
Pseudo strike
17.53
IV
52.6%
B/E move
3.1%
Puts
Pseudo strike
IV
B/E move

80Δ

Calls
Pseudo strike
IV
B/E move
Puts
Pseudo strike
IV
B/E move

Options history

IV · four-Friday blend33.07%
Daily close
GNTX25.1%34.9%44.7%2026-08-31: 27.49%2026-09-02: 35.83%2026-09-09: 36.41%2026-09-14: 31.91%2026-09-15: 38.28%2026-09-17: 43.39%2026-09-18: 34.38%2026-09-21: 29.94%2026-09-22: 28.91%2026-09-25: 31.74%2026-09-28: 26.48%2026-09-29: 35.41%2026-10-16: 34.92%2026-10-19: 32.90%2026-10-21: 31.91%2026-10-22: 33.71%2026-10-28: 26.46%2026-10-29: 37.31%2026-10-30: 33.07%Aug 31Sep 25Oct 30
19 observations2026-08-31 — 2026-10-30
Table
DateIV (%)
27.49%
35.83%
36.41%
31.91%
38.28%
43.39%
34.38%
29.94%
28.91%
31.74%
26.48%
35.41%
34.92%
32.90%
31.91%
33.71%
26.46%
37.31%
33.07%