Quidel Corporation (QDEL)
Quidel Corporation develops, manufactures, and markets diagnostic testing solutions for infectious disease, cardiology, thyroid, general and women's health, eye health, gastrointestinal disease, and toxicology applications globally. The company is headquartered in San Diego, 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 31.96% per annum.
- QDEL price at the close of November 19, 2024 was $38.58 and was inside the primary price channel.
- The secondary trend is decreasing.
- The decline rate of the secondary trend is 46.82% per annum.
- QDEL price at the close of November 19, 2024 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 QDEL 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: June 15, 2020
End date: November 19, 2024
a = 5.6268
b = -0.0011
s = 0.1693
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0011) – 1
= -31.96%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.1693) – 1
= 96.84%
June 15, 2020 calculations
Top border of price channel:
Exp(Y141)
= Exp(a + b × X141 + 2 × s)
= Exp(a + b × 208 + 2 × s)
= Exp(5.6268 + -0.0011 × 208 + 2 × 0.1693)
= Exp(5.7460)
= $312.93
Bottom border of price channel:
Exp(Y141)
= Exp(a + b × X141 – 2 × s)
= Exp(a + b × 208 – 2 × s)
= Exp(5.6268 + -0.0011 × 208 – 2 × 0.1693)
= Exp(5.0687)
= $158.98
November 19, 2024 calculations
Top border of price channel:
Exp(Y1,257)
= Exp(a + b × X1,257 + 2 × s)
= Exp(a + b × 1,826 + 2 × s)
= Exp(5.6268 + -0.0011 × 1,826 + 2 × 0.1693)
= Exp(4.0389)
= $56.76
Bottom border of price channel:
Exp(Y1,257)
= Exp(a + b × X1,257 – 2 × s)
= Exp(a + b × 1,826 – 2 × s)
= Exp(5.6268 + -0.0011 × 1,826 – 2 × 0.1693)
= Exp(3.3616)
= $28.84
Description
- The primary trend is decreasing.
- The decline rate of the primary trend is 31.96% per annum.
- QDEL price at the close of November 19, 2024 was $38.58 and was inside the primary price channel.
Secondary Trend
Start date: March 27, 2023
End date: November 19, 2024
a = 6.6920
b = -0.0017
s = 0.1324
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0017) – 1
= -46.82%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.1324) – 1
= 69.81%
March 27, 2023 calculations
Top border of price channel:
Exp(Y841)
= Exp(a + b × X841 + 2 × s)
= Exp(a + b × 1,223 + 2 × s)
= Exp(6.6920 + -0.0017 × 1,223 + 2 × 0.1324)
= Exp(4.8408)
= $126.57
Bottom border of price channel:
Exp(Y841)
= Exp(a + b × X841 – 2 × s)
= Exp(a + b × 1,223 – 2 × s)
= Exp(6.6920 + -0.0017 × 1,223 – 2 × 0.1324)
= Exp(4.3113)
= $74.54
November 19, 2024 calculations
Top border of price channel:
Exp(Y1,257)
= Exp(a + b × X1,257 + 2 × s)
= Exp(a + b × 1,826 + 2 × s)
= Exp(6.6920 + -0.0017 × 1,826 + 2 × 0.1324)
= Exp(3.7976)
= $44.59
Bottom border of price channel:
Exp(Y1,257)
= Exp(a + b × X1,257 – 2 × s)
= Exp(a + b × 1,826 – 2 × s)
= Exp(6.6920 + -0.0017 × 1,826 – 2 × 0.1324)
= Exp(3.2681)
= $26.26
Description
- The secondary trend is decreasing.
- The decline rate of the secondary trend is 46.82% per annum.
- QDEL price at the close of November 19, 2024 was inside the secondary price channel.