Stock Price Trends

Genuine Parts Co (GPC)

Genuine Parts Company (GPC) is an American service organization engaged in the distribution of automotive replacement parts, industrial replacement parts, office products and electrical/electronic materials.

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 18.89% per annum.
  • GPC price at the close of July 25, 2024 was $137.97 and was higher than the top border of the primary price channel by $5.99 (4.54%). This indicates a possible reversal in the primary trend direction.
  • The secondary trend is increasing.
  • The growth rate of the secondary trend is 28.21% per annum.
  • GPC price at the close of July 25, 2024 was lower than the bottom border of the secondary price channel by $10.72 (7.21%). This indicates a possible reversal in the secondary trend direction.
  • The direction of the secondary trend is opposite to the direction of the primary trend. This indicates a possible reversal in the direction of the primary trend.

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 GPC 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: October 21, 2022
End date: February 16, 2024

a = 5.8467

b = -0.0006

s = 0.0417

Annual growth rate:

Exp(365 × b) – 1
= Exp(365 × -0.0006) – 1
= -18.89%

Price channel spread:

Exp(4 × s) – 1
= Exp(4 × 0.0417) – 1
= 18.13%

October 21, 2022 calculations

Top border of price channel:

Exp(Y817)
= Exp(a + b × X817 + 2 × s)
= Exp(a + b × 1,183 + 2 × s)
= Exp(5.8467 + -0.0006 × 1,183 + 2 × 0.0417)
= Exp(5.2515)
= $190.84

Bottom border of price channel:

Exp(Y817)
= Exp(a + b × X817 – 2 × s)
= Exp(a + b × 1,183 – 2 × s)
= Exp(5.8467 + -0.0006 × 1,183 – 2 × 0.0417)
= Exp(5.0848)
= $161.55

February 16, 2024 calculations

Top border of price channel:

Exp(Y1,148)
= Exp(a + b × X1,148 + 2 × s)
= Exp(a + b × 1,666 + 2 × s)
= Exp(5.8467 + -0.0006 × 1,666 + 2 × 0.0417)
= Exp(4.9744)
= $144.67

Bottom border of price channel:

Exp(Y1,148)
= Exp(a + b × X1,148 – 2 × s)
= Exp(a + b × 1,666 – 2 × s)
= Exp(5.8467 + -0.0006 × 1,666 – 2 × 0.0417)
= Exp(4.8078)
= $122.46

Description

  • The primary trend is decreasing.
  • The decline rate of the primary trend is 18.89% per annum.
  • GPC price at the close of July 25, 2024 was $137.97 and was higher than the top border of the primary price channel by $5.99 (4.54%). This indicates a possible reversal in the primary trend direction.

Secondary Trend

Start date: September 21, 2023
End date: May 22, 2024

a = 3.8407

b = 0.0007

s = 0.0411

Annual growth rate:

Exp(365 × b) – 1
= Exp(365 × 0.0007) – 1
= 28.21%

Price channel spread:

Exp(4 × s) – 1
= Exp(4 × 0.0411) – 1
= 17.87%

September 21, 2023 calculations

Top border of price channel:

Exp(Y1,046)
= Exp(a + b × X1,046 + 2 × s)
= Exp(a + b × 1,518 + 2 × s)
= Exp(3.8407 + 0.0007 × 1,518 + 2 × 0.0411)
= Exp(4.9565)
= $142.10

Bottom border of price channel:

Exp(Y1,046)
= Exp(a + b × X1,046 – 2 × s)
= Exp(a + b × 1,518 – 2 × s)
= Exp(3.8407 + 0.0007 × 1,518 – 2 × 0.0411)
= Exp(4.7921)
= $120.56

May 22, 2024 calculations

Top border of price channel:

Exp(Y1,214)
= Exp(a + b × X1,214 + 2 × s)
= Exp(a + b × 1,762 + 2 × s)
= Exp(3.8407 + 0.0007 × 1,762 + 2 × 0.0411)
= Exp(5.1227)
= $167.78

Bottom border of price channel:

Exp(Y1,214)
= Exp(a + b × X1,214 – 2 × s)
= Exp(a + b × 1,762 – 2 × s)
= Exp(3.8407 + 0.0007 × 1,762 – 2 × 0.0411)
= Exp(4.9583)
= $142.35

Description

  • The secondary trend is increasing.
  • The growth rate of the secondary trend is 28.21% per annum.
  • GPC price at the close of July 25, 2024 was lower than the bottom border of the secondary price channel by $10.72 (7.21%). This indicates a possible reversal in the secondary trend direction.