# SunPower Corporation (SPWR)

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## 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 79.71% per annum.
• SPWR price at the close of December 8, 2023 was \$4.76 and was inside the primary price channel.
• The secondary trend is decreasing.
• The decline rate of the secondary trend is 89.34% per annum.
• SPWR price at the close of December 8, 2023 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 SPWR 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: November 10, 2022
End date: December 8, 2023

a = 9.4751

b = -0.0044

s = 0.1096

Annual growth rate:

Exp(365 × b) – 1
= Exp(365 × -0.0044) – 1
= -79.71%

Exp(4 × s) – 1
= Exp(4 × 0.1096) – 1
= 55.02%

#### November 10, 2022 calculations

Top border of price channel:

Exp(Y988)
= Exp(a + b × X988 + 2 × s)
= Exp(a + b × 1,431 + 2 × s)
= Exp(9.4751 + -0.0044 × 1,431 + 2 × 0.1096)
= Exp(3.4401)
= \$31.19

Bottom border of price channel:

Exp(Y988)
= Exp(a + b × X988 – 2 × s)
= Exp(a + b × 1,431 – 2 × s)
= Exp(9.4751 + -0.0044 × 1,431 – 2 × 0.1096)
= Exp(3.0017)
= \$20.12

#### December 8, 2023 calculations

Top border of price channel:

Exp(Y1,258)
= Exp(a + b × X1,258 + 2 × s)
= Exp(a + b × 1,824 + 2 × s)
= Exp(9.4751 + -0.0044 × 1,824 + 2 × 0.1096)
= Exp(1.7224)
= \$5.60

Bottom border of price channel:

Exp(Y1,258)
= Exp(a + b × X1,258 – 2 × s)
= Exp(a + b × 1,824 – 2 × s)
= Exp(9.4751 + -0.0044 × 1,824 – 2 × 0.1096)
= Exp(1.2840)
= \$3.61

### Secondary Trend

Start date: June 6, 2023
End date: December 8, 2023

a = 12.5493

b = -0.0061

s = 0.1003

Annual growth rate:

Exp(365 × b) – 1
= Exp(365 × -0.0061) – 1
= -89.34%

Exp(4 × s) – 1
= Exp(4 × 0.1003) – 1
= 49.38%

#### June 6, 2023 calculations

Top border of price channel:

Exp(Y1,129)
= Exp(a + b × X1,129 + 2 × s)
= Exp(a + b × 1,639 + 2 × s)
= Exp(12.5493 + -0.0061 × 1,639 + 2 × 0.1003)
= Exp(2.6964)
= \$14.83

Bottom border of price channel:

Exp(Y1,129)
= Exp(a + b × X1,129 – 2 × s)
= Exp(a + b × 1,639 – 2 × s)
= Exp(12.5493 + -0.0061 × 1,639 – 2 × 0.1003)
= Exp(2.2951)
= \$9.93

#### December 8, 2023 calculations

Top border of price channel:

Exp(Y1,258)
= Exp(a + b × X1,258 + 2 × s)
= Exp(a + b × 1,824 + 2 × s)
= Exp(12.5493 + -0.0061 × 1,824 + 2 × 0.1003)
= Exp(1.5617)
= \$4.77

Bottom border of price channel:

Exp(Y1,258)
= Exp(a + b × X1,258 – 2 × s)
= Exp(a + b × 1,824 – 2 × s)
= Exp(12.5493 + -0.0061 × 1,824 – 2 × 0.1003)
= Exp(1.1603)
= \$3.19