Biogen Inc (BIIB)
Biogen Inc. is a leading American biotechnology company headquartered in Cambridge, Massachusetts, focused on discovering, developing, and delivering innovative therapies for neurological diseases. With a strong pipeline of highly specialized products, Biogen addresses critical conditions such as multiple sclerosis, Alzheimer's disease, and spinal muscular atrophy. The company is committed to advancing scientific research and improving patient outcomes through its robust portfolio and collaborations with healthcare stakeholders worldwide. Biogen's dedication to innovation and patient care positions it as a prominent player in the biotechnology sector.
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 76.79% per annum.
- BIIB price at the close of January 7, 2026 was $186.91 and was inside the primary price channel.
- The secondary trend is increasing.
- The growth rate of the secondary trend is 121.33% per annum.
- BIIB price at the close of January 7, 2026 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 BIIB 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: April 7, 2025
End date: January 7, 2026
a = 2.3156
b = 0.0016
s = 0.0449
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × 0.0016) – 1
= 76.79%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0449) – 1
= 19.66%
April 7, 2025 calculations
Top border of price channel:
Exp(Y1,065)
= Exp(a + b × X1,065 + 2 × s)
= Exp(a + b × 1,550 + 2 × s)
= Exp(2.3156 + 0.0016 × 1,550 + 2 × 0.0449)
= Exp(4.8251)
= $124.60
Bottom border of price channel:
Exp(Y1,065)
= Exp(a + b × X1,065 – 2 × s)
= Exp(a + b × 1,550 – 2 × s)
= Exp(2.3156 + 0.0016 × 1,550 – 2 × 0.0449)
= Exp(4.6456)
= $104.13
January 7, 2026 calculations
Top border of price channel:
Exp(Y1,254)
= Exp(a + b × X1,254 + 2 × s)
= Exp(a + b × 1,825 + 2 × s)
= Exp(2.3156 + 0.0016 × 1,825 + 2 × 0.0449)
= Exp(5.2544)
= $191.40
Bottom border of price channel:
Exp(Y1,254)
= Exp(a + b × X1,254 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(2.3156 + 0.0016 × 1,825 – 2 × 0.0449)
= Exp(5.0749)
= $159.96
Description
- The primary trend is increasing.
- The growth rate of the primary trend is 76.79% per annum.
- BIIB price at the close of January 7, 2026 was $186.91 and was inside the primary price channel.
Secondary Trend
Start date: July 15, 2025
End date: January 7, 2026
a = 1.2361
b = 0.0022
s = 0.0370
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × 0.0022) – 1
= 121.33%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0370) – 1
= 15.95%
July 15, 2025 calculations
Top border of price channel:
Exp(Y1,132)
= Exp(a + b × X1,132 + 2 × s)
= Exp(a + b × 1,649 + 2 × s)
= Exp(1.2361 + 0.0022 × 1,649 + 2 × 0.0370)
= Exp(4.8994)
= $134.21
Bottom border of price channel:
Exp(Y1,132)
= Exp(a + b × X1,132 – 2 × s)
= Exp(a + b × 1,649 – 2 × s)
= Exp(1.2361 + 0.0022 × 1,649 – 2 × 0.0370)
= Exp(4.7514)
= $115.75
January 7, 2026 calculations
Top border of price channel:
Exp(Y1,254)
= Exp(a + b × X1,254 + 2 × s)
= Exp(a + b × 1,825 + 2 × s)
= Exp(1.2361 + 0.0022 × 1,825 + 2 × 0.0370)
= Exp(5.2825)
= $196.86
Bottom border of price channel:
Exp(Y1,254)
= Exp(a + b × X1,254 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(1.2361 + 0.0022 × 1,825 – 2 × 0.0370)
= Exp(5.1345)
= $169.78
Description
- The secondary trend is increasing.
- The growth rate of the secondary trend is 121.33% per annum.
- BIIB price at the close of January 7, 2026 was inside the secondary price channel.