First Solar (BSP:FSLR34) Shiller PE Ratio: (As of Sep. 21, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
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Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

BSP:FSLR34 First Solar Inc BSP:FSLR34
88 GF Score
Price R$50.30
GF Value R$138.02
Valuation Significantly Undervalued
! 4 Warning Signs
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What is First Solar Shiller PE Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


First Solar  (BSP:FSLR34) 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.


First Solar Shiller PE Ratio Related Terms


First Solar Shiller PE Ratio Historical Data

* Premium members only.

The historical data trend for First Solar'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.

First Solar Shiller PE Ratio Chart

First Solar Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Shiller PE Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only - - - 54,720.00 73,200.00

First Solar Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Shiller PE Ratio 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 Premium Member Only Premium Member Only 45,200.00 59,010.00 73,200.00 48,500.00 30,175.00

BSP:FSLR34 vs NXT, ENPH, RUN: Shiller PE Ratio Comparison

For the Solar subindustry, First Solar'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.


First Solar Shiller PE Ratio vs Semiconductors Industry

For the Semiconductors industry and Technology sector, First Solar's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where First Solar's Shiller PE Ratio falls into.


BSP:FSLR34
88GF Score
First Solar Inc BSP:FSLR34
Shiller PE Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

First Solar Shiller PE Ratio Calculation

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.

First Solar's E10 for the quarter that ended in Jun. 2026 is calculated as:

For example, First Solar's adjusted earnings per share data for the three months ended in Jun. 2026 was:

Adj_EPS=Earnings per Share (Diluted)/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=0.0099/333.9520*333.9520
=0.010

Current CPI (Jun. 2026) = 333.9520.

First Solar Quarterly Data

Earnings per Share (Diluted) CPI Adj_EPS
201609 0.000 241.428 0.000
201612 -0.001 241.432 -0.002
201703 0.000 243.801 0.000
201706 0.000 244.955 0.000
201709 0.000 246.819 0.000
201712 -0.001 246.524 -0.001
201803 0.000 249.554 0.000
201806 -0.000 251.989 -0.000
201809 0.000 252.439 0.000
201812 0.000 251.233 0.000
201903 -0.000 254.202 -0.000
201906 0.000 256.143 0.000
201909 0.000 256.759 0.000
201912 -0.000 256.974 -0.000
202003 0.000 258.115 0.000
202006 0.000 257.797 0.000
202009 0.000 260.280 0.001
202012 0.000 260.474 0.000
202103 0.001 264.877 0.001
202106 0.000 271.696 0.000
202109 0.000 274.310 0.000
202112 0.000 278.802 0.000
202203 -0.000 287.504 -0.000
202206 0.000 296.311 0.000
202209 -0.000 296.808 -0.000
202212 0.000 296.797 0.000
202303 0.000 301.836 0.000
202306 0.000 305.109 0.000
202309 0.001 307.789 0.001
202312 0.001 306.746 0.001
202403 0.001 312.332 0.001
202406 0.001 314.175 0.001
202409 0.001 315.301 0.001
202412 0.001 315.605 0.001
202503 0.001 319.799 0.001
202506 0.001 322.561 0.001
202509 0.001 324.800 0.001
202512 0.001 324.054 0.001
202603 0.001 330.213 0.001
202606 0.010 333.952 0.010

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.

Is First Solar (BSP:FSLR34) Overvalued in 2026?

Based on GuruFocus' analysis, First Solar stock appears to be undervalued. The current stock price of R$50.30 is trading 63.6% below its estimated GF Value™ of R$138.02. GuruFocus considers First Solar to be Significantly Undervalued.

Key valuation signals for BSP:FSLR34:

  • Shiller PE Ratio:
  • GF Value™: R$138.02 vs. price of R$50.30 (63.6% below fair value)
  • GF Score™: 88/100 with 4 warning signs

No single metric tells the full story. See the BSP:FSLR34 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


First Solar Business Description

Address 4300 East Camelback Road, Suite 220, Phoenix, AZ, USA, 85018
First Solar designs and manufactures solar photovoltaic panels, modules, and systems for use in utility-scale development projects. The company's solar modules use cadmium telluride to convert sunlight into electricity. This is commonly called thin-film technology. First Solar is the world's largest thin-film solar module manufacturer. It has production lines in Vietnam, Malaysia, the United States, and India.
88GF Score

Get the complete analysis for BSP:FSLR34

Shiller PE Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

R$50.30
Price
R$138.02
GF Value