Stock Price Trends
Stock price trends estimated using linear regression.
Summary
Key facts
- The primary trend is increasing.
- The growth rate of the primary trend is 13.79% per annum.
- SLB price at the close of September 18, 2026 was $51.12 and was inside the primary price channel.
- The secondary trend is increasing.
- The growth rate of the secondary trend is 166.26% per annum.
- SLB price at the close of September 18, 2026 was lower than the bottom border of the secondary price channel by $1.76 (3.34%). This indicates a possible reversal in the secondary trend direction.
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 SLB 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: January 14, 2026
End date: September 18, 2026
a = 3.8309
b = 0.0004
s = 0.0674
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × 0.0004) – 1
= 13.79%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0674) – 1
= 30.97%
January 14, 2026 calculations
Top border of price channel:
Exp(Y113)
= Exp(a + b × X113 + 2 × s)
= Exp(a + b × 163 + 2 × s)
= Exp(3.8309 + 0.0004 × 163 + 2 × 0.0674)
= Exp(4.0235)
= $55.90
Bottom border of price channel:
Exp(Y113)
= Exp(a + b × X113 – 2 × s)
= Exp(a + b × 163 – 2 × s)
= Exp(3.8309 + 0.0004 × 163 – 2 × 0.0674)
= Exp(3.7537)
= $42.68
September 18, 2026 calculations
Top border of price channel:
Exp(Y283)
= Exp(a + b × X283 + 2 × s)
= Exp(a + b × 410 + 2 × s)
= Exp(3.8309 + 0.0004 × 410 + 2 × 0.0674)
= Exp(4.1109)
= $61.00
Bottom border of price channel:
Exp(Y283)
= Exp(a + b × X283 – 2 × s)
= Exp(a + b × 410 – 2 × s)
= Exp(3.8309 + 0.0004 × 410 – 2 × 0.0674)
= Exp(3.8411)
= $46.58
Description
- The primary trend is increasing.
- The growth rate of the primary trend is 13.79% per annum.
- SLB price at the close of September 18, 2026 was $51.12 and was inside the primary price channel.
Secondary Trend
Start date: June 24, 2026
End date: September 18, 2026
a = 2.9428
b = 0.0027
s = 0.0374
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × 0.0027) – 1
= 166.26%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0374) – 1
= 16.13%
June 24, 2026 calculations
Top border of price channel:
Exp(Y223)
= Exp(a + b × X223 + 2 × s)
= Exp(a + b × 324 + 2 × s)
= Exp(2.9428 + 0.0027 × 324 + 2 × 0.0374)
= Exp(3.8869)
= $48.76
Bottom border of price channel:
Exp(Y223)
= Exp(a + b × X223 – 2 × s)
= Exp(a + b × 324 – 2 × s)
= Exp(2.9428 + 0.0027 × 324 – 2 × 0.0374)
= Exp(3.7374)
= $41.99
September 18, 2026 calculations
Top border of price channel:
Exp(Y283)
= Exp(a + b × X283 + 2 × s)
= Exp(a + b × 410 + 2 × s)
= Exp(2.9428 + 0.0027 × 410 + 2 × 0.0374)
= Exp(4.1176)
= $61.41
Bottom border of price channel:
Exp(Y283)
= Exp(a + b × X283 – 2 × s)
= Exp(a + b × 410 – 2 × s)
= Exp(2.9428 + 0.0027 × 410 – 2 × 0.0374)
= Exp(3.9681)
= $52.88
Description
- The secondary trend is increasing.
- The growth rate of the secondary trend is 166.26% per annum.
- SLB price at the close of September 18, 2026 was lower than the bottom border of the secondary price channel by $1.76 (3.34%). This indicates a possible reversal in the secondary trend direction.