DexCom Inc (DXCM)
DexCom, Inc. is a company that develops, manufactures, and distributes continuous glucose monitoring (CGM) systems for diabetes management. It operates internationally with headquarters in San Diego, California, and has a manufacturing facility in Mesa, Arizona.
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 40.71% per annum.
- DXCM price at the close of April 29, 2025 was $71.30 and was inside the primary price channel.
- The secondary trend is increasing.
- The growth rate of the secondary trend is 11.92% per annum.
- DXCM price at the close of April 29, 2025 was inside the secondary price channel.
- The direction of the secondary trend is opposite to the direction of the primary trend. This indicates a possible reversal in the direction of the primary trend.
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 DXCM 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 29, 2023
End date: April 29, 2025
a = 6.7880
b = -0.0014
s = 0.1580
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0014) – 1
= -40.71%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.1580) – 1
= 88.15%
November 29, 2023 calculations
Top border of price channel:
Exp(Y902)
= Exp(a + b × X902 + 2 × s)
= Exp(a + b × 1,308 + 2 × s)
= Exp(6.7880 + -0.0014 × 1,308 + 2 × 0.1580)
= Exp(5.2306)
= $186.91
Bottom border of price channel:
Exp(Y902)
= Exp(a + b × X902 – 2 × s)
= Exp(a + b × 1,308 – 2 × s)
= Exp(6.7880 + -0.0014 × 1,308 – 2 × 0.1580)
= Exp(4.5985)
= $99.34
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(6.7880 + -0.0014 × 1,825 + 2 × 0.1580)
= Exp(4.4901)
= $89.13
Bottom border of price channel:
Exp(Y1,255)
= Exp(a + b × X1,255 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(6.7880 + -0.0014 × 1,825 – 2 × 0.1580)
= Exp(3.8581)
= $47.37
Description
- The primary trend is decreasing.
- The decline rate of the primary trend is 40.71% per annum.
- DXCM price at the close of April 29, 2025 was $71.30 and was inside the primary price channel.
Secondary Trend
Start date: July 26, 2024
End date: April 29, 2025
a = 3.7901
b = 0.0003
s = 0.0909
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × 0.0003) – 1
= 11.92%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0909) – 1
= 43.82%
July 26, 2024 calculations
Top border of price channel:
Exp(Y1,066)
= Exp(a + b × X1,066 + 2 × s)
= Exp(a + b × 1,548 + 2 × s)
= Exp(3.7901 + 0.0003 × 1,548 + 2 × 0.0909)
= Exp(4.4494)
= $85.58
Bottom border of price channel:
Exp(Y1,066)
= Exp(a + b × X1,066 – 2 × s)
= Exp(a + b × 1,548 – 2 × s)
= Exp(3.7901 + 0.0003 × 1,548 – 2 × 0.0909)
= Exp(4.0860)
= $59.50
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(3.7901 + 0.0003 × 1,825 + 2 × 0.0909)
= Exp(4.5349)
= $93.21
Bottom border of price channel:
Exp(Y1,255)
= Exp(a + b × X1,255 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(3.7901 + 0.0003 × 1,825 – 2 × 0.0909)
= Exp(4.1715)
= $64.81
Description
- The secondary trend is increasing.
- The growth rate of the secondary trend is 11.92% per annum.
- DXCM price at the close of April 29, 2025 was inside the secondary price channel.