Stock Price Trends

Transdigm Group Incorporated (TDG)

TransDigm Group is a publicly traded aerospace manufacturing company headquartered in Cleveland, Ohio. TransDigm develops and manufactures engineered aerospace components.

Stock Price Trends

Stock price trends estimated using linear regression.

Key facts

  • The primary trend is increasing.
  • The growth rate of the primary trend is 66.62% per annum.
  • TDG price at the close of July 26, 2024 was $1,234.86 and was lower than the bottom border of the primary price channel by $1.65 (0.13%). This indicates a possible reversal in the primary trend direction.
  • The secondary trend is decreasing.
  • The decline rate of the secondary trend is 36.40% per annum.
  • TDG price at the close of July 26, 2024 was inside the secondary price channel.
  • 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 TDG 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: September 13, 2022
End date: July 16, 2024

a = 4.6777

b = 0.0014

s = 0.0546

Annual growth rate:

Exp(365 × b) – 1
= Exp(365 × 0.0014) – 1
= 66.62%

Price channel spread:

Exp(4 × s) – 1
= Exp(4 × 0.0546) – 1
= 24.39%

September 13, 2022 calculations

Top border of price channel:

Exp(Y788)
= Exp(a + b × X788 + 2 × s)
= Exp(a + b × 1,142 + 2 × s)
= Exp(4.6777 + 0.0014 × 1,142 + 2 × 0.0546)
= Exp(6.3843)
= $592.45

Bottom border of price channel:

Exp(Y788)
= Exp(a + b × X788 – 2 × s)
= Exp(a + b × 1,142 – 2 × s)
= Exp(4.6777 + 0.0014 × 1,142 – 2 × 0.0546)
= Exp(6.1660)
= $476.30

July 16, 2024 calculations

Top border of price channel:

Exp(Y1,249)
= Exp(a + b × X1,249 + 2 × s)
= Exp(a + b × 1,814 + 2 × s)
= Exp(4.6777 + 0.0014 × 1,814 + 2 × 0.0546)
= Exp(7.3243)
= $1,516.67

Bottom border of price channel:

Exp(Y1,249)
= Exp(a + b × X1,249 – 2 × s)
= Exp(a + b × 1,814 – 2 × s)
= Exp(4.6777 + 0.0014 × 1,814 – 2 × 0.0546)
= Exp(7.1061)
= $1,219.33

Description

  • The primary trend is increasing.
  • The growth rate of the primary trend is 66.62% per annum.
  • TDG price at the close of July 26, 2024 was $1,234.86 and was lower than the bottom border of the primary price channel by $1.65 (0.13%). This indicates a possible reversal in the primary trend direction.

Secondary Trend

Start date: May 21, 2024
End date: July 26, 2024

a = 9.3874

b = -0.0012

s = 0.0142

Annual growth rate:

Exp(365 × b) – 1
= Exp(365 × -0.0012) – 1
= -36.40%

Price channel spread:

Exp(4 × s) – 1
= Exp(4 × 0.0142) – 1
= 5.86%

May 21, 2024 calculations

Top border of price channel:

Exp(Y1,212)
= Exp(a + b × X1,212 + 2 × s)
= Exp(a + b × 1,758 + 2 × s)
= Exp(9.3874 + -0.0012 × 1,758 + 2 × 0.0142)
= Exp(7.2364)
= $1,389.14

Bottom border of price channel:

Exp(Y1,212)
= Exp(a + b × X1,212 – 2 × s)
= Exp(a + b × 1,758 – 2 × s)
= Exp(9.3874 + -0.0012 × 1,758 – 2 × 0.0142)
= Exp(7.1795)
= $1,312.19

July 26, 2024 calculations

Top border of price channel:

Exp(Y1,257)
= Exp(a + b × X1,257 + 2 × s)
= Exp(a + b × 1,824 + 2 × s)
= Exp(9.3874 + -0.0012 × 1,824 + 2 × 0.0142)
= Exp(7.1546)
= $1,280.01

Bottom border of price channel:

Exp(Y1,257)
= Exp(a + b × X1,257 – 2 × s)
= Exp(a + b × 1,824 – 2 × s)
= Exp(9.3874 + -0.0012 × 1,824 – 2 × 0.0142)
= Exp(7.0976)
= $1,209.10

Description

  • The secondary trend is decreasing.
  • The decline rate of the secondary trend is 36.40% per annum.
  • TDG price at the close of July 26, 2024 was inside the secondary price channel.