Gentex Corporation (GNTX)
Gentex Corporation designs, develops, manufactures, markets, and supplies digital vision, connected car, tinted glass, and fire protection products in the United States, Germany, Japan, Mexico, and internationally. The company is headquartered in Zeeland, Michigan.
Stock Price Trends
Stock price trends estimated using linear regression.
Key facts
- The primary trend is decreasing.
- The decline rate of the primary trend is 31.90% per annum.
- GNTX price at the close of April 28, 2025 was $21.79 and was inside the primary price channel.
- The secondary trend is decreasing.
- The decline rate of the secondary trend is 58.84% per annum.
- GNTX price at the close of April 28, 2025 was inside the secondary price channel.
Linear Regression Model
Model equation:
Yi = α + β × Xi + εi
Top border of price channel:
Exp(Yi) = Exp(a + b × Xi + 2 × s)
Bottom border of price channel:
Exp(Yi) = Exp(a + b × Xi – 2 × s)
where:
i - observation number
Yi - natural logarithm of GNTX price
Xi - time index, 1 day interval
σ - standard deviation of εi
a - estimator of α
b - estimator of β
s - estimator of σ
Exp() - calculates the exponent of e
Primary Trend
Start date: February 21, 2024
End date: April 28, 2025
a = 5.0808
b = -0.0011
s = 0.0517
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0011) – 1
= -31.90%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0517) – 1
= 22.96%
February 21, 2024 calculations
Top border of price channel:
Exp(Y959)
= Exp(a + b × X959 + 2 × s)
= Exp(a + b × 1,393 + 2 × s)
= Exp(5.0808 + -0.0011 × 1,393 + 2 × 0.0517)
= Exp(3.7181)
= $41.19
Bottom border of price channel:
Exp(Y959)
= Exp(a + b × X959 – 2 × s)
= Exp(a + b × 1,393 – 2 × s)
= Exp(5.0808 + -0.0011 × 1,393 – 2 × 0.0517)
= Exp(3.5114)
= $33.50
April 28, 2025 calculations
Top border of price channel:
Exp(Y1,255)
= Exp(a + b × X1,255 + 2 × s)
= Exp(a + b × 1,825 + 2 × s)
= Exp(5.0808 + -0.0011 × 1,825 + 2 × 0.0517)
= Exp(3.2635)
= $26.14
Bottom border of price channel:
Exp(Y1,255)
= Exp(a + b × X1,255 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(5.0808 + -0.0011 × 1,825 – 2 × 0.0517)
= Exp(3.0568)
= $21.26
Description
- The primary trend is decreasing.
- The decline rate of the primary trend is 31.90% per annum.
- GNTX price at the close of April 28, 2025 was $21.79 and was inside the primary price channel.
Secondary Trend
Start date: November 22, 2024
End date: April 28, 2025
a = 7.4946
b = -0.0024
s = 0.0304
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0024) – 1
= -58.84%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0304) – 1
= 12.95%
November 22, 2024 calculations
Top border of price channel:
Exp(Y1,151)
= Exp(a + b × X1,151 + 2 × s)
= Exp(a + b × 1,668 + 2 × s)
= Exp(7.4946 + -0.0024 × 1,668 + 2 × 0.0304)
= Exp(3.4988)
= $33.08
Bottom border of price channel:
Exp(Y1,151)
= Exp(a + b × X1,151 – 2 × s)
= Exp(a + b × 1,668 – 2 × s)
= Exp(7.4946 + -0.0024 × 1,668 – 2 × 0.0304)
= Exp(3.3770)
= $29.28
April 28, 2025 calculations
Top border of price channel:
Exp(Y1,255)
= Exp(a + b × X1,255 + 2 × s)
= Exp(a + b × 1,825 + 2 × s)
= Exp(7.4946 + -0.0024 × 1,825 + 2 × 0.0304)
= Exp(3.1170)
= $22.58
Bottom border of price channel:
Exp(Y1,255)
= Exp(a + b × X1,255 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(7.4946 + -0.0024 × 1,825 – 2 × 0.0304)
= Exp(2.9952)
= $19.99
Description
- The secondary trend is decreasing.
- The decline rate of the secondary trend is 58.84% per annum.
- GNTX price at the close of April 28, 2025 was inside the secondary price channel.