Gilead Sciences Inc (GILD)
Gilead Sciences, Inc. is a leading American biopharmaceutical company based in Foster City, California, dedicated to the research and development of innovative antiviral therapies for a range of infectious diseases, including HIV, hepatitis B, hepatitis C, and influenza. The company's notable products, such as Harvoni and Sovaldi, have transformed the treatment landscape for chronic hepatitis C and are at the forefront of its extensive drug portfolio. Gilead continues to leverage its pioneering research capabilities to address unmet medical needs and expand its therapeutic offerings, positioning itself as a crucial player in global healthcare.
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 85.14% per annum.
- GILD price at the close of November 11, 2025 was $122.56 and was lower than the bottom border of the primary price channel by $22.48 (15.50%). This indicates a possible reversal in the primary trend direction.
- The secondary trend is increasing.
- The growth rate of the secondary trend is 39.49% per annum.
- GILD price at the close of November 11, 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 GILD 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 2, 2024
End date: April 7, 2025
a = 1.9893
b = 0.0017
s = 0.0460
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × 0.0017) – 1
= 85.14%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0460) – 1
= 20.21%
April 2, 2024 calculations
Top border of price channel:
Exp(Y849)
= Exp(a + b × X849 + 2 × s)
= Exp(a + b × 1,237 + 2 × s)
= Exp(1.9893 + 0.0017 × 1,237 + 2 × 0.0460)
= Exp(4.1688)
= $64.64
Bottom border of price channel:
Exp(Y849)
= Exp(a + b × X849 – 2 × s)
= Exp(a + b × 1,237 – 2 × s)
= Exp(1.9893 + 0.0017 × 1,237 – 2 × 0.0460)
= Exp(3.9848)
= $53.77
April 7, 2025 calculations
Top border of price channel:
Exp(Y1,103)
= Exp(a + b × X1,103 + 2 × s)
= Exp(a + b × 1,607 + 2 × s)
= Exp(1.9893 + 0.0017 × 1,607 + 2 × 0.0460)
= Exp(4.7932)
= $120.69
Bottom border of price channel:
Exp(Y1,103)
= Exp(a + b × X1,103 – 2 × s)
= Exp(a + b × 1,607 – 2 × s)
= Exp(1.9893 + 0.0017 × 1,607 – 2 × 0.0460)
= Exp(4.6092)
= $100.40
Description
- The primary trend is increasing.
- The growth rate of the primary trend is 85.14% per annum.
- GILD price at the close of November 11, 2025 was $122.56 and was lower than the bottom border of the primary price channel by $22.48 (15.50%). This indicates a possible reversal in the primary trend direction.
Secondary Trend
Start date: September 12, 2024
End date: November 11, 2025
a = 3.1516
b = 0.0009
s = 0.0468
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × 0.0009) – 1
= 39.49%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0468) – 1
= 20.59%
September 12, 2024 calculations
Top border of price channel:
Exp(Y962)
= Exp(a + b × X962 + 2 × s)
= Exp(a + b × 1,400 + 2 × s)
= Exp(3.1516 + 0.0009 × 1,400 + 2 × 0.0468)
= Exp(4.5219)
= $92.01
Bottom border of price channel:
Exp(Y962)
= Exp(a + b × X962 – 2 × s)
= Exp(a + b × 1,400 – 2 × s)
= Exp(3.1516 + 0.0009 × 1,400 – 2 × 0.0468)
= Exp(4.3347)
= $76.30
November 11, 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(3.1516 + 0.0009 × 1,825 + 2 × 0.0468)
= Exp(4.9095)
= $135.57
Bottom border of price channel:
Exp(Y1,254)
= Exp(a + b × X1,254 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(3.1516 + 0.0009 × 1,825 – 2 × 0.0468)
= Exp(4.7223)
= $112.42
Description
- The secondary trend is increasing.
- The growth rate of the secondary trend is 39.49% per annum.
- GILD price at the close of November 11, 2025 was inside the secondary price channel.