Donaldson Company Inc (DCI)
Donaldson Company, Inc. manufactures and sells filtration systems and replacement parts worldwide. The company is headquartered in Bloomington, Minnesota.
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 4.03% per annum.
- DCI price at the close of March 31, 2025 was $67.06 and was inside the primary price channel.
- The secondary trend is decreasing.
- The decline rate of the secondary trend is 22.04% per annum.
- DCI price at the close of March 31, 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 DCI 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: March 1, 2024
End date: March 31, 2025
a = 4.4547
b = -0.0001
s = 0.0301
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0001) – 1
= -4.03%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0301) – 1
= 12.80%
March 1, 2024 calculations
Top border of price channel:
Exp(Y985)
= Exp(a + b × X985 + 2 × s)
= Exp(a + b × 1,430 + 2 × s)
= Exp(4.4547 + -0.0001 × 1,430 + 2 × 0.0301)
= Exp(4.3537)
= $77.76
Bottom border of price channel:
Exp(Y985)
= Exp(a + b × X985 – 2 × s)
= Exp(a + b × 1,430 – 2 × s)
= Exp(4.4547 + -0.0001 × 1,430 – 2 × 0.0301)
= Exp(4.2332)
= $68.94
March 31, 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(4.4547 + -0.0001 × 1,825 + 2 × 0.0301)
= Exp(4.3091)
= $74.37
Bottom border of price channel:
Exp(Y1,255)
= Exp(a + b × X1,255 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(4.4547 + -0.0001 × 1,825 – 2 × 0.0301)
= Exp(4.1887)
= $65.94
Description
- The primary trend is decreasing.
- The decline rate of the primary trend is 4.03% per annum.
- DCI price at the close of March 31, 2025 was $67.06 and was inside the primary price channel.
Secondary Trend
Start date: October 17, 2024
End date: March 31, 2025
a = 5.4508
b = -0.0007
s = 0.0300
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0007) – 1
= -22.04%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0300) – 1
= 12.75%
October 17, 2024 calculations
Top border of price channel:
Exp(Y1,144)
= Exp(a + b × X1,144 + 2 × s)
= Exp(a + b × 1,660 + 2 × s)
= Exp(5.4508 + -0.0007 × 1,660 + 2 × 0.0300)
= Exp(4.3786)
= $79.72
Bottom border of price channel:
Exp(Y1,144)
= Exp(a + b × X1,144 – 2 × s)
= Exp(a + b × 1,660 – 2 × s)
= Exp(5.4508 + -0.0007 × 1,660 – 2 × 0.0300)
= Exp(4.2586)
= $70.71
March 31, 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(5.4508 + -0.0007 × 1,825 + 2 × 0.0300)
= Exp(4.2660)
= $71.24
Bottom border of price channel:
Exp(Y1,255)
= Exp(a + b × X1,255 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(5.4508 + -0.0007 × 1,825 – 2 × 0.0300)
= Exp(4.1460)
= $63.18
Description
- The secondary trend is decreasing.
- The decline rate of the secondary trend is 22.04% per annum.
- DCI price at the close of March 31, 2025 was inside the secondary price channel.