SPWR (SunPower) ROC (Joel Greenblatt) %: 671.76% (As of Jun. 2026)

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SPWR SunPower Inc SPWR
53 GF Score
Price $0.27
GF Value $2.02
Valuation Possible Value Trap
! 6 Warning Signs
View Full Analysis

What is SunPower ROC (Joel Greenblatt) %?

SunPower SPWR -9.51% 53 ROC (Joel Greenblatt) % is 671.76% as of Jun. 2026. GuruFocus rates SPWR with a GF Score™ of 53/100 and a GF Value™ of $2.02 (Possible Value Trap). The stock has 6 warning signs investors should review. Among 1,032 Semiconductors companies, SunPower ranks worse than 96.51% on this metric.

Joel Greenblatt defined Return on Capital differently in his book The Little Book That Still Beats the Market (Little Books. Big Profits). He defines ROC (Joel Greenblatt) % as EBIT divided by the total of Property, Plant and Equipment and net working capital. SunPower's annualized ROC (Joel Greenblatt) % for the quarter that ended in Jun. 2026 was 671.76%.

The historical rank and industry rank for SunPower's ROC (Joel Greenblatt) % or its related term are showing as below:

SPWR' s ROC (Joel Greenblatt) % Range Over the Past 10 Years
Min: -705.32   Med: -253.38   Max: -195.61
Current: -400.95

During the past 6 years, SunPower's highest ROC (Joel Greenblatt) % was -195.61%. The lowest was -705.32%. And the median was -253.38%.

SPWR's ROC (Joel Greenblatt) % is ranked worse than
96.51% of 1032 companies
in the Semiconductors industry
Industry Median: 12.245 vs SPWR: -400.95

SunPower's 5-Year average Growth Rate of ROC (Joel Greenblatt) % was 0.00% per year.


SunPower  (NAS:SPWR) ROC (Joel Greenblatt) % Explanation

The way Joel Greenblatt defines Return on Capital is a more accurate measure of how efficiently the company generates returns onthe capital actually invested in the business. EBIT is used instead of net income because the tax and interest payment may be affected by factors other than the core business operation. Intangible assets are not included in the calculation because they don't need to be replaced.

Joel Greenblatt uses his definition of Return on Capital and Earnings Yield (Joel Greenblatt) % to rank companies.


SunPower ROC (Joel Greenblatt) % Related Terms


SunPower ROC (Joel Greenblatt) % Historical Data

* Premium members only.

The historical data trend for SunPower's ROC (Joel Greenblatt) % 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.

SunPower ROC (Joel Greenblatt) % Chart

SunPower Annual Data
Trend Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
ROC (Joel Greenblatt) %
Get a 7-Day Free Trial -253.38 -221.91 -705.32 -542.68 -195.61

SunPower Quarterly Data
Dec21 Mar22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
ROC (Joel Greenblatt) % Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only -1,231.15 -143.19 -36.04 478.82 671.76

SPWR vs PN, HYSR, FTCI: ROC (Joel Greenblatt) % Comparison

For the Solar subindustry, SunPower's ROC (Joel Greenblatt) %, along with its competitors' market caps and ROC (Joel Greenblatt) % 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.


SunPower ROC (Joel Greenblatt) % vs Semiconductors Industry

For the Semiconductors industry and Technology sector, SunPower's ROC (Joel Greenblatt) % distribution charts can be found below:

* The bar in red indicates where SunPower's ROC (Joel Greenblatt) % falls into.


SPWR
53GF Score
SunPower Inc SPWR
ROC (Joel Greenblatt) % is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

SunPower ROC (Joel Greenblatt) % Calculation

Joel Greenblatt defined Return on Capital differently in his book The Little Book That Still Beats the Market (Little Books. Big Profits) . He defines Return on Capital as follows:

ROC (Joel Greenblatt) %=EBIT/Average of (Net fixed Assets + Net Working Capital)

EBIT stands for Earnings Before Interest and Taxes.

Fixed Assets are also known as non-current assets. They include the Property, Plant and Equipment that the firm needs in its operation.

GuruFocus calculates net working capital as: (Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Deferred Revenue + Other Current Liabilities). We're trying to account for OPERATING assets and liabilities (part of daily business) when calculating working capital. Cash and marketable securities are considered NON-OPERATING assets and are not included in calculation. We will also back out all interest bearing debt, short term debt and the portion of long term debt that is due in the current period from the current liabilities. This debt will be considered when computing cost of capital and it would be inappropriate to count it twice.

Working Capital(Q: Mar. 2026 )
=(Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Defer. Rev. + Other Current Liabilities)
=(80.585 + 4.098 + 27.852) - (73.927 + 34.604 + 25.245)
=-21.241

Working Capital(Q: Jun. 2026 )
=(Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Defer. Rev. + Other Current Liabilities)
=(68.925 + 3.26 + 37.573) - (76.871 + 24.782 + 20.085)
=-11.98

When net working capital is negative, 0 is used.

So ROC (Joel Greenblatt) % of SunPower for the quarter that ended in Jun. 2026 can be restated as:

ROC (Joel Greenblatt) %(Q: Jun. 2026 )
=EBIT/Average of (Net fixed Assets + Net Working Capital)
=EBIT/Average of (Property, Plant and Equipment+Net Working Capital)
     Q: Mar. 2026  Q: Jun. 2026
=EBIT/( ( (Property, Plant and Equipment + Net Working Capital) + (Property, Plant and Equipment + Net Working Capital) )/ count )
=61.456/( ( (9.882 + max(-21.241, 0)) + (8.415 + max(-11.98, 0)) )/ 2 )
=61.456/( ( 9.882 + 8.415 )/ 2 )
=61.456/9.1485
=671.76 %

Note: The EBIT data used here is four times the quarterly (Jun. 2026) EBIT data.

* 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.

What does a ROC (Joel Greenblatt) % of 671.76% mean?
SunPower (SPWR) has a ROC (Joel Greenblatt) % of 671.76% as of Jun. 2026. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on SunPower and its competitors. According to the industry distribution chart, SunPower ranks #996 out of 1032 companies in the Semiconductors industry, placing it in the top 96.5%.
Is SunPower's ROC (Joel Greenblatt) % too high?
SunPower's current ROC (Joel Greenblatt) % is 671.76%. The Semiconductors industry median ROC (Joel Greenblatt) % is 12.25. SunPower's value of 671.76% is 5386% above this industry median. Based on the distribution chart, SunPower ranks #996 out of 1032 companies in the Semiconductors industry, which is in the bottom quartile relative to peers. Overall, SunPower has a GF Score™ of 53/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does SunPower's ROC (Joel Greenblatt) % compare to PN and HYSR?
According to the Semiconductors industry distribution chart, SunPower ranks #996 out of 1032 companies for ROC (Joel Greenblatt) %. This places SunPower in the lower half of its industry. The industry median ROC (Joel Greenblatt) % is 12.25. SunPower's value of 671.76% is 5386% above this benchmark. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good ROC (Joel Greenblatt) % for a Semiconductors company?
The median ROC (Joel Greenblatt) % among Semiconductors companies is 12.25, based on 1,032 companies in the industry. Companies in the top quartile (top 25%) have a ROC (Joel Greenblatt) % significantly above this median, while those in the bottom quartile fall well below. However, ROC (Joel Greenblatt) % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. SunPower's current ROC (Joel Greenblatt) % of 671.76% is 5386% 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 ROC (Joel Greenblatt) % mean?
A high ROC (Joel Greenblatt) % can signal that a stock is expensive relative to its fundamentals. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on SunPower and its competitors. For the Semiconductors industry, the median ROC (Joel Greenblatt) % is 12.25 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. SunPower's current ROC (Joel Greenblatt) % is 671.76%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is SunPower stock overvalued right now?
Based on GuruFocus' analysis, SunPower (SPWR) is currently considered Possible Value Trap. The stock's GF Value™ is $2.02, compared to a current price of $0.27 — trading 86.4% below its estimated fair value. The current ROC (Joel Greenblatt) % is 671.76% and 5386% above the Semiconductors industry median of 12.25. SunPower's overall GF Score™ is 53/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is ROC (Joel Greenblatt) % calculated?
ROC (Joel Greenblatt) % is calculated from a company's financial statements. For SunPower (SPWR), the current ROC (Joel Greenblatt) % is 671.76% as of Jun. 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 SunPower (SPWR) Overvalued in 2026?

Based on GuruFocus' analysis, SunPower stock appears to be undervalued. The current stock price of $0.27 is trading 86.4% below its estimated GF Value™ of $2.02. GuruFocus considers SunPower to be Possible Value Trap.

Key valuation signals for SPWR:

  • ROC (Joel Greenblatt) %: 671.76%
  • GF Value™: $2.02 vs. price of $0.27 (86.4% below fair value)
  • GF Score™: 53/100 with 6 warning signs
  • Industry Position: 5386% above the Semiconductors median (#996 of 1032)

No single metric tells the full story. See the SPWR stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


SunPower Business Description

Address 1403 North Research Way, Orem, UT, USA, 84097
SunPower Inc is a solar technology and energy services provider, specializing in residential solar solutions, battery storage, and home energy management. Company has three segments namely, Residential Solar Installation, this segment performs solar system, storage and battery installations for residential homeowners. New Homes Business-This segment performs solar system installations for new home builders and Dealer -This segment provides a third-party solar energy sales force to initiate and execute contracts with customers throughout the United States. Company generates key revenue from the Residential Solar Installation segment.
53GF Score

Get the complete analysis for SPWR

ROC (Joel Greenblatt) % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$0.27
Price
$2.02
GF Value