Biomarin Pharmaceutical Inc (BMRN)
BioMarin Pharmaceutical Inc. develops and markets therapies for people with rare diseases and serious and life-threatening medical conditions. The company is headquartered in San Rafael, California.
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 19.61% per annum.
- BMRN price at the close of July 1, 2025 was $56.19 and was inside the primary price channel.
- The secondary trend is decreasing.
- The decline rate of the secondary trend is 28.45% per annum.
- BMRN price at the close of July 1, 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 BMRN 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 30, 2022
End date: July 1, 2025
a = 5.2143
b = -0.0006
s = 0.0785
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0006) – 1
= -19.61%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0785) – 1
= 36.91%
November 30, 2022 calculations
Top border of price channel:
Exp(Y608)
= Exp(a + b × X608 + 2 × s)
= Exp(a + b × 881 + 2 × s)
= Exp(5.2143 + -0.0006 × 881 + 2 × 0.0785)
= Exp(4.8445)
= $127.04
Bottom border of price channel:
Exp(Y608)
= Exp(a + b × X608 – 2 × s)
= Exp(a + b × 881 – 2 × s)
= Exp(5.2143 + -0.0006 × 881 – 2 × 0.0785)
= Exp(4.5304)
= $92.79
July 1, 2025 calculations
Top border of price channel:
Exp(Y1,254)
= Exp(a + b × X1,254 + 2 × s)
= Exp(a + b × 1,825 + 2 × s)
= Exp(5.2143 + -0.0006 × 1,825 + 2 × 0.0785)
= Exp(4.2799)
= $72.24
Bottom border of price channel:
Exp(Y1,254)
= Exp(a + b × X1,254 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(5.2143 + -0.0006 × 1,825 – 2 × 0.0785)
= Exp(3.9658)
= $52.76
Description
- The primary trend is decreasing.
- The decline rate of the primary trend is 19.61% per annum.
- BMRN price at the close of July 1, 2025 was $56.19 and was inside the primary price channel.
Secondary Trend
Start date: December 4, 2023
End date: July 1, 2025
a = 5.7254
b = -0.0009
s = 0.0677
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0009) – 1
= -28.45%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0677) – 1
= 31.12%
December 4, 2023 calculations
Top border of price channel:
Exp(Y861)
= Exp(a + b × X861 + 2 × s)
= Exp(a + b × 1,250 + 2 × s)
= Exp(5.7254 + -0.0009 × 1,250 + 2 × 0.0677)
= Exp(4.7143)
= $111.53
Bottom border of price channel:
Exp(Y861)
= Exp(a + b × X861 – 2 × s)
= Exp(a + b × 1,250 – 2 × s)
= Exp(5.7254 + -0.0009 × 1,250 – 2 × 0.0677)
= Exp(4.4434)
= $85.06
July 1, 2025 calculations
Top border of price channel:
Exp(Y1,254)
= Exp(a + b × X1,254 + 2 × s)
= Exp(a + b × 1,825 + 2 × s)
= Exp(5.7254 + -0.0009 × 1,825 + 2 × 0.0677)
= Exp(4.1869)
= $65.82
Bottom border of price channel:
Exp(Y1,254)
= Exp(a + b × X1,254 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(5.7254 + -0.0009 × 1,825 – 2 × 0.0677)
= Exp(3.9160)
= $50.20
Description
- The secondary trend is decreasing.
- The decline rate of the secondary trend is 28.45% per annum.
- BMRN price at the close of July 1, 2025 was inside the secondary price channel.