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Jack In The BoxMEX:JACK 33 Shiller PE Ratio is 3.57 as of Sep. 13, 2026, which is 85% below its 10-year median of 23.51. GuruFocus rates MEX:JACK with a GF Score™ of 33/100 and a GF Value™ of MXN896.71 (Significantly Undervalued). The stock has 8 warning signs investors should review. Among 158 Restaurants companies, Jack In The Box ranks better than 96.84% on this metric.
As of today (2026-09-13), Jack In The Box's current share price is MXN315.00. Jack In The Box's E10 for the quarter that ended in Jun. 2026 was MXN88.26. Jack In The Box's Shiller PE Ratio for today is 3.57.
The historical rank and industry rank for Jack In The Box's Shiller PE Ratio or its related term are showing as below:
MEX:JACK'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 2 Med: 23.51 Max: 55.98
Current: 2.96
During the past years, Jack In The Box's highest Shiller PE Ratio was 55.98. The lowest was 2.00. And the median was 23.51.
MEX:JACK's Shiller PE Ratio is ranked better than 96.84% of 158
companies
in the Restaurants industry
Industry Median: 24.42
vs MEX:JACK: 2.96
E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.
Jack In The Box's adjusted earnings per share data for the three months ended in Jun. 2026 was MXN17.972. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is MXN88.26 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Jack In The Box (MEX:JACK) Shiller PE Ratio Explanation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
Jack In The Box Shiller PE Ratio Related Terms
Jack In The Box Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Jack In The Box's Shiller PE 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.
MEX:JACK vs PTLO, RICK, NATH: Shiller PE Ratio Comparison
For the Restaurants subindustry, Jack In The Box's Shiller PE Ratio, along with its competitors' market caps and Shiller PE 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.
Jack In The Box Shiller PE Ratio vs Restaurants Industry
For the Restaurants industry and Consumer Cyclical sector, Jack In The Box's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Jack In The Box's Shiller PE Ratio falls into.
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
Jack In The Box's Shiller PE 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.
Jack In The Box's E10 for the quarter that ended in Jun. 2026 is calculated as:
For example, Jack In The Box's adjusted earnings per share data for the three months ended in Jun. 2026 was:
Add all the adjusted EPS together and divide 10 will get our E10.
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.
Jack In The Box (MEX:JACK) has a Shiller PE Ratio of 3.57 as of Sep. 13, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Jack In The Box and its competitors. This is 85% below median its historical median of 23.51. Over the past decade, Jack In The Box's Shiller PE Ratio has ranged from 2.00 to 55.98. According to the industry distribution chart, Jack In The Box ranks #5 out of 158 companies in the Restaurants industry, placing it in the top 3.2%.
Is Jack In The Box's Shiller PE Ratio too high?
Jack In The Box's current Shiller PE Ratio of 3.57 is 85% below median its 10-year median of 23.51. Over the past 10 years, this metric has ranged from a low of 2.00 to a high of 55.98. The Restaurants industry median Shiller PE Ratio is 24.42. Jack In The Box's value of 3.57 is 85.4% below this industry median. Based on the distribution chart, Jack In The Box ranks #5 out of 158 companies in the Restaurants industry, which is in the top quartile — a strong position relative to peers. Overall, Jack In The Box has a GF Score™ of 33/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Jack In The Box's Shiller PE Ratio compare to PTLO and RICK?
According to the Restaurants industry distribution chart, Jack In The Box ranks #5 out of 158 companies for Shiller PE Ratio. This places Jack In The Box in the top 3% of its industry — outperforming the majority of peers. The industry median Shiller PE Ratio is 24.42. Jack In The Box's value of 3.57 is 85.4% below this benchmark. Historically, Jack In The Box's own Shiller PE Ratio has ranged from 2.00 to 55.98 over the past decade. While the company's 10-year median is 23.51 vs. the industry median of 24.42, Jack In The Box 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 Shiller PE Ratio for a Restaurants company?
The median Shiller PE Ratio among Restaurants companies is 24.42, based on 158 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Jack In The Box's current Shiller PE Ratio of 3.57 is 85.4% 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 Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Jack In The Box and its competitors. For the Restaurants industry, the median Shiller PE Ratio is 24.42 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Jack In The Box's current Shiller PE Ratio is 3.57, which is 85% below median its own 10-year median of 23.51. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Jack In The Box stock overvalued right now?
Based on GuruFocus' analysis, Jack In The Box (MEX:JACK) is currently considered Significantly Undervalued. The stock's GF Value™ is MXN896.71, compared to a current price of MXN315.00 — trading 64.9% below its estimated fair value. The current Shiller PE Ratio is 3.57, which is 85% below median its 10-year median of 23.51 and 85.4% below the Restaurants industry median of 24.42. Jack In The Box's overall GF Score™ is 33/100 with 8 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For Jack In The Box (MEX:JACK), the current Shiller PE Ratio is 3.57 as of Sep. 13, 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 Jack In The Box (MEX:JACK) Overvalued in 2026?
Based on GuruFocus' analysis, Jack In The Box stock appears to be undervalued.
The current stock price of MXN315.00 is trading 64.9% below its estimated GF Value™ of MXN896.71.
GuruFocus considers Jack In The Box to be Significantly Undervalued.
Key valuation signals for MEX:JACK:
Shiller PE Ratio: 3.57 (85% below median its 10-year median of 23.51)
GF Value™: MXN896.71 vs. price of MXN315.00 (64.9% below fair value)
Industry Position: 85.4% below the Restaurants median (#5 of 158)
No single metric tells the full story. See the MEX:JACK stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Jack In The Box Inc operates quick-service restaurants and fast-casual restaurants across various states in the United States of America. Its core business includes the Jack in the Box hamburger chain, known for a broad menu that features hamburgers, tacos, sandwiches, salads, and breakfast items. The company also operates the Del Taco brand, which offers a variety of both Mexican and American favorites such as burritos and fries. These foods are available with the option of customization as per customer requirements. The company also offers catering and delivery services to its customers. Jack in the Box and Del Taco restaurant brands are the two reportable operating segments, of which, Jack in the Box generates maximum revenue for the company.
33GF Score
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