STAAR Surgical Company (STAA)
STAAR Surgical Company designs, develops, manufactures, markets and sells implantable eye lenses and supplemental delivery systems for placing the lenses in the eye. The company is headquartered in Lake Forest, 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 38.47% per annum.
- STAA price at the close of May 8, 2024 was $41.02 and was inside the primary price channel.
- The secondary trend is increasing.
- The growth rate of the secondary trend is 647.84% per annum.
- STAA price at the close of May 8, 2024 was lower than the bottom border of the secondary price channel by $2.88 (6.55%). This indicates a possible reversal in the secondary trend direction.
- 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 STAA 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 5, 2021
End date: April 3, 2024
a = 5.8772
b = -0.0013
s = 0.1742
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × -0.0013) – 1
= -38.47%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.1742) – 1
= 100.74%
April 5, 2021 calculations
Top border of price channel:
Exp(Y479)
= Exp(a + b × X479 + 2 × s)
= Exp(a + b × 697 + 2 × s)
= Exp(5.8772 + -0.0013 × 697 + 2 × 0.1742)
= Exp(5.2981)
= $199.96
Bottom border of price channel:
Exp(Y479)
= Exp(a + b × X479 – 2 × s)
= Exp(a + b × 697 – 2 × s)
= Exp(5.8772 + -0.0013 × 697 – 2 × 0.1742)
= Exp(4.6013)
= $99.61
April 3, 2024 calculations
Top border of price channel:
Exp(Y1,233)
= Exp(a + b × X1,233 + 2 × s)
= Exp(a + b × 1,791 + 2 × s)
= Exp(5.8772 + -0.0013 × 1,791 + 2 × 0.1742)
= Exp(3.8424)
= $46.64
Bottom border of price channel:
Exp(Y1,233)
= Exp(a + b × X1,233 – 2 × s)
= Exp(a + b × 1,791 – 2 × s)
= Exp(5.8772 + -0.0013 × 1,791 – 2 × 0.1742)
= Exp(3.1455)
= $23.23
Description
- The primary trend is decreasing.
- The decline rate of the primary trend is 38.47% per annum.
- STAA price at the close of May 8, 2024 was $41.02 and was inside the primary price channel.
Secondary Trend
Start date: January 16, 2024
End date: May 7, 2024
a = -6.1452
b = 0.0055
s = 0.0693
Annual growth rate:
Exp(365 × b) – 1
= Exp(365 × 0.0055) – 1
= 647.84%
Price channel spread:
Exp(4 × s) – 1
= Exp(4 × 0.0693) – 1
= 31.92%
January 16, 2024 calculations
Top border of price channel:
Exp(Y1,179)
= Exp(a + b × X1,179 + 2 × s)
= Exp(a + b × 1,713 + 2 × s)
= Exp(-6.1452 + 0.0055 × 1,713 + 2 × 0.0693)
= Exp(3.4360)
= $31.06
Bottom border of price channel:
Exp(Y1,179)
= Exp(a + b × X1,179 – 2 × s)
= Exp(a + b × 1,713 – 2 × s)
= Exp(-6.1452 + 0.0055 × 1,713 – 2 × 0.0693)
= Exp(3.1589)
= $23.55
May 7, 2024 calculations
Top border of price channel:
Exp(Y1,257)
= Exp(a + b × X1,257 + 2 × s)
= Exp(a + b × 1,825 + 2 × s)
= Exp(-6.1452 + 0.0055 × 1,825 + 2 × 0.0693)
= Exp(4.0534)
= $57.59
Bottom border of price channel:
Exp(Y1,257)
= Exp(a + b × X1,257 – 2 × s)
= Exp(a + b × 1,825 – 2 × s)
= Exp(-6.1452 + 0.0055 × 1,825 – 2 × 0.0693)
= Exp(3.7763)
= $43.66
Description
- The secondary trend is increasing.
- The growth rate of the secondary trend is 647.84% per annum.
- STAA price at the close of May 8, 2024 was lower than the bottom border of the secondary price channel by $2.88 (6.55%). This indicates a possible reversal in the secondary trend direction.