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PTC TherapeuticsPTCT -1.44%62 Cyclically Adjusted PB Ratio is 68.53 as of Aug. 12, 2026, which is 748% above its 10-year median of 8.08. GuruFocus rates PTCT with a GF Score™ of 62/100 and a GF Value™ of $37.54 (Significantly Overvalued). The stock has 7 warning signs investors should review. Among 693 Biotechnology companies, PTC Therapeutics ranks worse than 98.56% on this metric.
The historical rank and industry rank for PTC Therapeutics's Cyclically Adjusted PB Ratio or its related term are showing as below:
PTCT'
s Cyclically Adjusted PB Ratio Range Over the Past 10 Years
Min: 3.43 Med: 8.08 Max: 80.05
Current: 69.79
During the past years, PTC Therapeutics's highest Cyclically Adjusted PB Ratio was 80.05. The lowest was 3.43. And the median was 8.08.
PTCT's Cyclically Adjusted PB Ratio is ranked worse than 98.56% of 693
companies
in the Biotechnology industry
Industry Median: 1.62
vs PTCT: 69.79
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.
PTC Therapeutics's adjusted book value per share data for the three months ended in Jun. 2026 was $-1.985. 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 $1.06 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
PTC Therapeutics (NAS:PTCT) 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.
PTC Therapeutics Cyclically Adjusted PB Ratio Related Terms
PTC Therapeutics Cyclically Adjusted PB Ratio Historical Data
* Premium members only.
The historical data trend for PTC Therapeutics'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.
PTC Therapeutics Cyclically Adjusted PB Ratio Chart
PTCT vs XENE, CGON, ERAS: Cyclically Adjusted PB Ratio Comparison
For the Biotechnology subindustry, PTC Therapeutics'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.
PTC Therapeutics Cyclically Adjusted PB Ratio vs Biotechnology Industry
For the Biotechnology industry and Healthcare sector, PTC Therapeutics's Cyclically Adjusted PB Ratio distribution charts can be found below:
* The bar in red indicates where PTC Therapeutics's Cyclically Adjusted PB Ratio falls into.
PTC Therapeutics 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.
PTC Therapeutics's Cyclically Adjusted PB Ratio for today is calculated as
* 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 68.53 mean?
PTC Therapeutics (PTCT) has a Cyclically Adjusted PB Ratio of 68.53 as of Aug. 12, 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 PTC Therapeutics and its competitors. This is 748% above median its historical median of 8.08. Over the past decade, PTC Therapeutics' Cyclically Adjusted PB Ratio has ranged from 3.43 to 80.05. According to the industry distribution chart, PTC Therapeutics ranks #683 out of 693 companies in the Biotechnology industry, placing it in the top 98.6%.
Is PTC Therapeutics' Cyclically Adjusted PB Ratio too high?
PTC Therapeutics' current Cyclically Adjusted PB Ratio of 68.53 is 748% above median its 10-year median of 8.08. Over the past 10 years, this metric has ranged from a low of 3.43 to a high of 80.05. The Biotechnology industry median Cyclically Adjusted PB Ratio is 1.62. PTC Therapeutics' value of 68.53 is 4130.2% above this industry median. Based on the distribution chart, PTC Therapeutics ranks #683 out of 693 companies in the Biotechnology industry, which is in the bottom quartile relative to peers. Overall, PTC Therapeutics has a GF Score™ of 62/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does PTC Therapeutics' Cyclically Adjusted PB Ratio compare to XENE and CGON?
According to the Biotechnology industry distribution chart, PTC Therapeutics ranks #683 out of 693 companies for Cyclically Adjusted PB Ratio. This places PTC Therapeutics in the lower half of its industry. The industry median Cyclically Adjusted PB Ratio is 1.62. PTC Therapeutics' value of 68.53 is 4130.2% above this benchmark. Historically, PTC Therapeutics' own Cyclically Adjusted PB Ratio has ranged from 3.43 to 80.05 over the past decade. While the company's 10-year median is 8.08 vs. the industry median of 1.62, PTC Therapeutics has consistently been above 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 Biotechnology company?
The median Cyclically Adjusted PB Ratio among Biotechnology companies is 1.62, based on 693 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. PTC Therapeutics's current Cyclically Adjusted PB Ratio of 68.53 is 4130.2% above 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 PTC Therapeutics and its competitors. For the Biotechnology industry, the median Cyclically Adjusted PB Ratio is 1.62 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. PTC Therapeutics's current Cyclically Adjusted PB Ratio is 68.53, which is 748% above median its own 10-year median of 8.08. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is PTC Therapeutics stock overvalued right now?
Based on GuruFocus' analysis, PTC Therapeutics (PTCT) is currently considered Significantly Overvalued. The stock's GF Value™ is $37.54, compared to a current price of $72.64 — trading 93.5% above its estimated fair value. The current Cyclically Adjusted PB Ratio is 68.53, which is 748% above median its 10-year median of 8.08 and 4130.2% above the Biotechnology industry median of 1.62. PTC Therapeutics' overall GF Score™ is 62/100 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 PTC Therapeutics (PTCT), the current Cyclically Adjusted PB Ratio is 68.53 as of Aug. 12, 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 PTC Therapeutics (PTCT) Overvalued in 2026?
Based on GuruFocus' analysis, PTC Therapeutics stock appears to be overvalued.
The current stock price of $72.64 is trading 93.5% above its estimated GF Value™ of $37.54.
GuruFocus considers PTC Therapeutics to be Significantly Overvalued.
Key valuation signals for PTCT:
Cyclically Adjusted PB Ratio: 68.53 (748% above median its 10-year median of 8.08)
GF Value™: $37.54 vs. price of $72.64 (93.5% above fair value)
Industry Position: 4130.2% above the Biotechnology median (#683 of 693)
No single metric tells the full story. See the PTCT stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
PTC Therapeutics Inc is a biopharmaceutical company that discovers, develops and commercializes clinically differentiated medicines that provide benefits to children and adults living with rare disorders. Its diversified therapeutic portfolio that includes several commercial products and product candidates in various stages of development, including discovery, research and clinical stages, focused on the development of new treatments for multiple therapeutic areas for rare diseases relating to neurology and metabolism. The company views its operations and manages its business in one operating segment: life science, which is focused on the discovery, development and commercialization of the company's clinically differentiated medicines that provide benefits to patients with rare disorders.
62GF Score
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