Graham Number is a figure that measures a stock's fundamental value by taking into account the company's earnings per share and book value per share. The Graham number is the upper bound of the price range that a defensive investor should pay for the stock. According to the theory, any stock price below the Graham number is considered undervalued, and thus worth investing in.
As of today (2026-07-06), the stock price of Western Digital is CHF450.90. Western Digital's graham number for the quarter that ended in Mar. 2026 was CHFN/A. Therefore, Western Digital's Price to Graham Number ratio for today is N/A.
The historical rank and industry rank for Western Digital's Graham Number or its related term are showing as below:
During the past 13 years, the highest Price to Graham Number ratio of Western Digital was 10.00. The lowest was 0.87. And the median was 2.55.
XSWX:WDC's Price-to-Graham-Number is not ranked *
in the Hardware industry.
Industry Median: 2.07 * Ranked among companies with meaningful Price-to-Graham-Number only.
Graham Number is a combination of asset valuation and earnings power valuation. It is a very conservative way of valuing a stock.
Western Digital (XSWX:WDC) Graham Number Explanation
Ben Graham actually did not publish a formula like this. But he wrote in The Intelligent Investor (1948 version) regarding to the criteria for purchases:
Current price should not be more than 15 times average earnings of the past three years.
Current price should not be more than 1.5 times the book value last reported. However, a multiplier of earnings below 15 could justify a correspondingly higher multiplier of assets. As a rule of thumb we suggest that the product of the multiplier times the ratio of price to book value should not exceed 22.5. (This figure corresponds to 15 times earnings and 1.5 times book value. It would admit an issue selling at only 9 times earnings and 2.5 times asset value, etc.)
Unlike valuation methods such as DCF or Discounted Earnings, the Graham number does not take growth into the valuation. Unlike the valuation methods based on book value alone, it takes into account the earnings power. Therefore, the Graham Number is a combination of asset valuation and earnings power valuation.
In general, the Graham number is a very conservative way of valuing a stock. It cannot be applied to companies with negative book values.
Western Digital's Price to Graham number Ratio for today is calculated as
Price to Graham number
=
Share Price (Today)
/
Graham number (Q: Mar. 2026 )
=
450.90
/
N/A
=
N/A
* 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.
Be Aware
Please keep these in mind:
1. Graham Number does not take growth into account. Therefore it underestimates the values of the companies that have good earnings growth. We feel that if the earnings per share grows more than 10% a year, Graham Number underestimates the value.
2. Graham Number punishes the companies that have temporarily low earnings. Therefore, an average of earnings makes more sense in the calculation of Graham Number.
3. Graham Numbers underestimates companies that are light with book.
Western Digital Graham Number Related Terms
Western Digital Graham Number Historical Data
* Premium members only.
The historical data trend for Western Digital's Graham Number 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.
XSWX:WDC vs STX, ANET, DELL: Graham Number Comparison
For the Computer Hardware subindustry, Western Digital's Price-to-Graham-Number, along with its competitors' market caps and Price-to-Graham-Number 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.
Western Digital Price-to-Graham-Number vs Hardware Industry
For the Hardware industry and Technology sector, Western Digital's Price-to-Graham-Number distribution charts can be found below:
* The bar in red indicates where Western Digital's Price-to-Graham-Number falls into.
* 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.
Western Digital (XSWX:WDC) has a Graham Number of CHFN/A as of Mar. 2026. The Graham Number values a company based on its per-share earnings and book value. View historical data on Western Digital and its competitors. Over the past decade, Western Digital's Graham Number has ranged from 0.87 to 10.00. According to the industry distribution chart, Western Digital ranks #1505 out of 1619 companies in the Hardware industry, placing it in the top 93%.
Is Western Digital's Graham Number too high?
Western Digital's current Graham Number is CHFN/A. Over the past 10 years, this metric has ranged from a low of 0.87 to a high of 10.00. Based on the distribution chart, Western Digital ranks #1505 out of 1619 companies in the Hardware industry, which is in the bottom quartile relative to peers. Overall, Western Digital has a GF Score™ of 60/100, reflecting its overall financial health beyond just this single metric.
How does Western Digital's Graham Number compare to STX and ANET?
According to the Hardware industry distribution chart, Western Digital ranks #1505 out of 1619 companies for Graham Number. This places Western Digital in the lower half of its industry. The industry median Graham Number is 2.07. Historically, Western Digital's own Graham Number has ranged from 0.87 to 10.00 over the past decade. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Graham Number for a Hardware company?
The median Graham Number among Hardware companies is 2.07, based on 1,619 companies in the industry. Companies in the top quartile (top 25%) have a Graham Number significantly above this median, while those in the bottom quartile fall well below. However, Graham Number should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Graham Number mean?
A high Graham Number can signal that a stock is expensive relative to its fundamentals. The Graham Number values a company based on its per-share earnings and book value. View historical data on Western Digital and its competitors. For the Hardware industry, the median Graham Number is 2.07 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Western Digital's current Graham Number is CHFN/A. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Western Digital stock overvalued right now?
Western Digital (XSWX:WDC) has a current Graham Number of CHFN/A. The stock's GF Value™ is CHF20.85, compared to a current price of CHF450.90 — trading 2062.6% above its estimated fair value. The current Graham Number is CHFN/A. Western Digital's overall GF Score™ is 60/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Graham Number calculated?
Graham Number is calculated from a company's financial statements. For Western Digital (XSWX:WDC), the current Graham Number is CHFN/A as of Mar. 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 Western Digital (XSWX:WDC) Overvalued in 2026?
Based on GuruFocus' analysis, Western Digital stock appears to be overvalued.
The current stock price of CHF450.90 is trading 2062.6% above its estimated GF Value™ of CHF20.85.
Key valuation signals for XSWX:WDC:
Graham Number: CHFN/A
GF Value™: CHF20.85 vs. price of CHF450.90 (2062.6% above fair value)
No single metric tells the full story. See the XSWX:WDC stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Western Digital is a leading vertically integrated supplier of hard disk drives. The HDD market is a practical duopoly, with Western Digital and Seagate being the two largest players. Western Digital designs and manufactures its HDDs, with much of the manufacturing and workforce located in Asia. The primary consumers of HDDs are data centers.
60GF Score
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