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Westport Fuel SystemsTSX:WPRT -0.40%43 Cyclically Adjusted PB Ratio is 0.19 as of Aug. 23, 2026, which is 68% below its 10-year median of 0.60. GuruFocus rates TSX:WPRT with a GF Score™ of 43/100 and a GF Value™ of C$1.03 (Significantly Overvalued). The stock has 7 warning signs investors should review. Among 947 Vehicles & Parts companies, Westport Fuel Systems ranks better than 95.88% on this metric.
The historical rank and industry rank for Westport Fuel Systems's Cyclically Adjusted PB Ratio or its related term are showing as below:
TSX:WPRT'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 0.16 Med: 0.6 Max: 5.01
Current: 0.19
During the past years, Westport Fuel Systems's highest Cyclically Adjusted PB Ratio was 5.01. The lowest was 0.16. And the median was 0.60.
TSX:WPRT's Cyclically Adjusted PB Ratio is ranked better than 95.88% of 947
companies
in the Vehicles & Parts industry
Industry Median: 1.23
vs TSX:WPRT: 0.19
The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.
Westport Fuel Systems's adjusted book value per share data for the three months ended in Jun. 2026 was C$3.862. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is C$13.13 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Westport Fuel Systems (TSX:WPRT) Cyclically Adjusted PB Ratio Explanation
Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.
Westport Fuel Systems Cyclically Adjusted PB Ratio Related Terms
Westport Fuel Systems Cyclically Adjusted PB Ratio Historical Data
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The historical data trend for Westport Fuel Systems's Cyclically Adjusted PB Ratio can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Westport Fuel Systems Cyclically Adjusted PB Ratio Chart
TSX:WPRT vs ORLY, AZO, GPC: Cyclically Adjusted PB Ratio Comparison
For the Auto Parts subindustry, Westport Fuel Systems's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted PB Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Westport Fuel Systems Cyclically Adjusted PB Ratio vs Vehicles & Parts Industry
For the Vehicles & Parts industry and Consumer Cyclical sector, Westport Fuel Systems's Cyclically Adjusted PB Ratio distribution charts can be found below:
* The bar in red indicates where Westport Fuel Systems's Cyclically Adjusted PB Ratio falls into.
Westport Fuel Systems Cyclically Adjusted PB Ratio Calculation
Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
What does a Cyclically Adjusted PB Ratio of 0.19 mean?
Westport Fuel Systems (TSX:WPRT) has a Cyclically Adjusted PB Ratio of 0.19 as of Aug. 23, 2026. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on Westport Fuel Systems and its competitors. This is 68% below median its historical median of 0.60. Over the past decade, Westport Fuel Systems' Cyclically Adjusted PB Ratio has ranged from 0.16 to 5.01. According to the industry distribution chart, Westport Fuel Systems ranks #39 out of 947 companies in the Vehicles & Parts industry, placing it in the top 4.1%.
Is Westport Fuel Systems' Cyclically Adjusted PB Ratio too high?
Westport Fuel Systems' current Cyclically Adjusted PB Ratio of 0.19 is 68% below median its 10-year median of 0.60. Over the past 10 years, this metric has ranged from a low of 0.16 to a high of 5.01. The Vehicles & Parts industry median Cyclically Adjusted PB Ratio is 1.23. Westport Fuel Systems' value of 0.19 is 84.6% below this industry median. Based on the distribution chart, Westport Fuel Systems ranks #39 out of 947 companies in the Vehicles & Parts industry, which is in the top quartile — a strong position relative to peers. Overall, Westport Fuel Systems has a GF Score™ of 43/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Westport Fuel Systems' Cyclically Adjusted PB Ratio compare to ORLY and AZO?
According to the Vehicles & Parts industry distribution chart, Westport Fuel Systems ranks #39 out of 947 companies for Cyclically Adjusted PB Ratio. This places Westport Fuel Systems in the top 4% of its industry — outperforming the majority of peers. The industry median Cyclically Adjusted PB Ratio is 1.23. Westport Fuel Systems' value of 0.19 is 84.6% below this benchmark. Historically, Westport Fuel Systems' own Cyclically Adjusted PB Ratio has ranged from 0.16 to 5.01 over the past decade. While the company's 10-year median is 0.60 vs. the industry median of 1.23, Westport Fuel Systems has consistently been below the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted PB Ratio for a Vehicles & Parts company?
The median Cyclically Adjusted PB Ratio among Vehicles & Parts companies is 1.23, based on 947 companies in the industry. Companies in the top quartile (top 25%) have a Cyclically Adjusted PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, Cyclically Adjusted PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Westport Fuel Systems's current Cyclically Adjusted PB Ratio of 0.19 is 84.6% below the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Cyclically Adjusted PB Ratio mean?
A high Cyclically Adjusted PB Ratio can signal that a stock is expensive relative to its fundamentals. Cyclically Adjusted PB Ratio is the ratio of share price to a company's inflation-adjusted book value per share over a 10-year period. View historical data on Westport Fuel Systems and its competitors. For the Vehicles & Parts industry, the median Cyclically Adjusted PB Ratio is 1.23 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Westport Fuel Systems's current Cyclically Adjusted PB Ratio is 0.19, which is 68% below median its own 10-year median of 0.60. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Westport Fuel Systems stock overvalued right now?
Based on GuruFocus' analysis, Westport Fuel Systems (TSX:WPRT) is currently considered Significantly Overvalued. The stock's GF Value™ is C$1.03, compared to a current price of C$2.50 — trading 142.7% above its estimated fair value. The current Cyclically Adjusted PB Ratio is 0.19, which is 68% below median its 10-year median of 0.60 and 84.6% below the Vehicles & Parts industry median of 1.23. Westport Fuel Systems' overall GF Score™ is 43/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted PB Ratio calculated?
Cyclically Adjusted PB Ratio is calculated from a company's financial statements. For Westport Fuel Systems (TSX:WPRT), the current Cyclically Adjusted PB Ratio is 0.19 as of Aug. 23, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Westport Fuel Systems (TSX:WPRT) Overvalued in 2026?
Based on GuruFocus' analysis, Westport Fuel Systems stock appears to be overvalued.
The current stock price of C$2.50 is trading 142.7% above its estimated GF Value™ of C$1.03.
GuruFocus considers Westport Fuel Systems to be Significantly Overvalued.
Key valuation signals for TSX:WPRT:
Cyclically Adjusted PB Ratio: 0.19 (68% below median its 10-year median of 0.60)
GF Value™: C$1.03 vs. price of C$2.50 (142.7% above fair value)
Industry Position: 84.6% below the Vehicles & Parts median (#39 of 947)
No single metric tells the full story. See the TSX:WPRT stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Westport Fuel Systems Inc is an organization engaged in the engineering, manufacturing, and supply of alternative fuel systems and components for transportation applications. It has three reportable segments: High-Pressure Controls, Heavy-Duty OEM, and Cespira. It derives maximum revenue from Heavy-Duty OEM segment. Heavy-Duty OEM segment's products include HPDI related fuel system solutions and components. Geographically, the company operates in Europe, America and Asia, of which it generates maximum revenue from Europe. It also develops and supplies advanced LPG, CNG, LNG and H2 systems and components for OEM (original equipment manufacturer) D-OEM (delayed oem) and After Market (retrofit market) world-wide.
43GF Score
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