Repligen Corporation (RGEN)
Repligen Corporation develops and markets bioprocessing systems and technologies for use in the biologic drug manufacturing process in North America, Europe, Asia Pacific, and internationally. The company is headquartered in Waltham, Massachusetts.
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 54.80% per annum.
- RGEN price at the close of April 29, 2025 was $139.43 and was higher than the top border of the primary price channel by $119.95 (615.94%). This indicates a possible reversal in the primary trend direction.
- The secondary trend is decreasing.
- The decline rate of the secondary trend is 8.15% per annum.
- RGEN price at the close of April 29, 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 RGEN 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: July 23, 2021
End date: July 5, 2022
a = 6.7144
b = -0.0022
s = 0.1125
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0022) – 1
= -54.80%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.1125) – 1
= 56.81%
July 23, 2021 calculations
Top border of price channel:
Exp(Y310)
= Exp(a + b × X310 + 2 × s)
= Exp(a + b × 449 + 2 × s)
= Exp(6.7144 + -0.0022 × 449 + 2 × 0.1125)
= Exp(5.9626)
= $388.61
Bottom border of price channel:
Exp(Y310)
= Exp(a + b × X310 – 2 × s)
= Exp(a + b × 449 – 2 × s)
= Exp(6.7144 + -0.0022 × 449 – 2 × 0.1125)
= Exp(5.5127)
= $247.82
July 5, 2022 calculations
Top border of price channel:
Exp(Y548)
= Exp(a + b × X548 + 2 × s)
= Exp(a + b × 796 + 2 × s)
= Exp(6.7144 + -0.0022 × 796 + 2 × 0.1125)
= Exp(5.2077)
= $182.67
Bottom border of price channel:
Exp(Y548)
= Exp(a + b × X548 – 2 × s)
= Exp(a + b × 796 – 2 × s)
= Exp(6.7144 + -0.0022 × 796 – 2 × 0.1125)
= Exp(4.7578)
= $116.49
Description
- The primary trend is decreasing.
- The decline rate of the primary trend is 54.80% per annum.
- RGEN price at the close of April 29, 2025 was $139.43 and was higher than the top border of the primary price channel by $119.95 (615.94%). This indicates a possible reversal in the primary trend direction.
Secondary Trend
Start date: January 4, 2022
End date: April 29, 2025
a = 5.3916
b = -0.0002
s = 0.1199
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0002) – 1
= -8.15%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.1199) – 1
= 61.53%
January 4, 2022 calculations
Top border of price channel:
Exp(Y424)
= Exp(a + b × X424 + 2 × s)
= Exp(a + b × 614 + 2 × s)
= Exp(5.3916 + -0.0002 × 614 + 2 × 0.1199)
= Exp(5.4884)
= $241.87
Bottom border of price channel:
Exp(Y424)
= Exp(a + b × X424 – 2 × s)
= Exp(a + b × 614 – 2 × s)
= Exp(5.3916 + -0.0002 × 614 – 2 × 0.1199)
= Exp(5.0089)
= $149.74
April 29, 2025 calculations
Top border of price channel:
Exp(Y1,255)
= Exp(a + b × X1,255 + 2 × s)
= Exp(a + b × 1,825 + 2 × s)
= Exp(5.3916 + -0.0002 × 1,825 + 2 × 0.1199)
= Exp(5.2064)
= $182.43
Bottom border of price channel:
Exp(Y1,255)
= Exp(a + b × X1,255 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(5.3916 + -0.0002 × 1,825 – 2 × 0.1199)
= Exp(4.7269)
= $112.94
Description
- The secondary trend is decreasing.
- The decline rate of the secondary trend is 8.15% per annum.
- RGEN price at the close of April 29, 2025 was inside the secondary price channel.