FTEK (Fuel Tech) E10: $-0.25 (As of Mar. 2026)


FTEK Fuel Tech Inc FTEK
63 GF Score
Price $2.15
GF Value $1.13
Valuation Significantly Overvalued
! 3 Warning Signs
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What is Fuel Tech E10?

Fuel Tech FTEK +12.57% 63 E10 is $-0.25 as of Mar. 2026. GuruFocus rates FTEK with a GF Score™ of 63/100 and a GF Value™ of $1.13 (Significantly Overvalued). The stock has 3 warning signs investors should review.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.

Fuel Tech's adjusted earnings per share data for the three months ended in Mar. 2026 was $-0.040. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is $-0.25 for the trailing ten years ended in Mar. 2026.

During the past 3 years, the average E10 Growth Rate was 9.40% per year. During the past 5 years, the average E10 Growth Rate was 0.20% per year. Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the E10 growth rate using E10 data.

During the past 13 years, the highest 3-Year average E10 Growth Rate of Fuel Tech was 71.00% per year. The lowest was -33.90% per year. And the median was -1.20% per year.

As of today (2026-06-27), Fuel Tech's current stock price is $2.15. Fuel Tech's E10 for the quarter that ended in Mar. 2026 was $-0.25. Fuel Tech's Shiller PE Ratio of today is .


Fuel Tech  (NAS:FTEK) E10 Explanation

If a company grows much fast than inflation, E10 may underestimate the company's earnings power. Shiller PE Ratio can seem to be too high even the actual P/E is low.

For the Shiller P/E, 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 P/E is also called PE10.

The Shiller P/E was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.


Be Aware

Shiller PE Ratio works better for cyclical companies. It gives you a better idea on the company's real earnings power.


Fuel Tech E10 Related Terms


Fuel Tech E10 Historical Data

* Premium members only.

The historical data trend for Fuel Tech's E10 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.

Fuel Tech E10 Chart

Fuel Tech Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
E10
Get a 7-Day Free Trial Premium Member Only Premium Member Only -0.32 -0.35 -0.40 -0.32 -0.26

Fuel Tech Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
E10 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 -0.31 -0.31 -0.31 -0.26 -0.25

FTEK vs BCHT, SCWO, CLIR: E10 Comparison

For the Pollution & Treatment Controls subindustry, Fuel Tech'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.


Fuel Tech Shiller PE Ratio vs Industrial Products Industry

For the Industrial Products industry and Industrials sector, Fuel Tech's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where Fuel Tech's Shiller PE Ratio falls into.


FTEK
63GF Score
Fuel Tech Inc FTEK
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Fuel Tech E10 Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. When we calculate the today's Shiller P/E ratio of a stock, we use today's price divided by E10.

What is E10? How do we calculate E10?

E10 is the average of the inflation adjusted earnings of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the E10 of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the earnings from 2001 through 2010.

We adjusted the earnings of 2001 earnings data with the total inflation from 2001 through 2010 to the equivalent earnings in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart earned $1 a share in 2001, then the 2001's equivalent earnings in 2010 is $1.4 a share. If Wal-Mart earns $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 earnings in 2010 is $1.35. So on and so forth, you get the equivalent earnings of past 10 years. Then you add them together and divided the sum by 10 to get 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.

For example, Fuel Tech's adjusted earnings per share data for the three months ended in Mar. 2026 was:

Adj_EPS= Earnings per Share (Diluted) /CPI of Mar. 2026 (Change)*Current CPI (Mar. 2026)
=-0.04/330.2130*330.2130
=-0.040

Current CPI (Mar. 2026) = 330.2130.

Fuel Tech Quarterly Data

per share eps CPI Adj_EPS
201606 -0.120 241.018 -0.164
201609 -0.130 241.428 -0.178
201612 -0.390 241.432 -0.533
201703 -0.110 243.801 -0.149
201706 -0.290 244.955 -0.391
201709 -0.020 246.819 -0.027
201712 -0.050 246.524 -0.067
201803 -0.010 249.554 -0.013
201806 -0.070 251.989 -0.092
201809 0.040 252.439 0.052
201812 0.040 251.233 0.053
201903 -0.050 254.202 -0.065
201906 -0.040 256.143 -0.052
201909 -0.050 256.759 -0.064
201912 -0.180 256.974 -0.231
202003 -0.100 258.115 -0.128
202006 -0.100 257.797 -0.128
202009 0.090 260.280 0.114
202012 -0.070 260.474 -0.089
202103 0.010 264.877 0.012
202106 -0.030 271.696 -0.036
202109 0.020 274.310 0.024
202112 -0.010 278.802 -0.012
202203 -0.030 287.504 -0.034
202206 -0.010 296.311 -0.011
202209 0.010 296.808 0.011
202212 -0.010 296.797 -0.011
202303 -0.010 301.836 -0.011
202306 -0.030 305.109 -0.032
202309 0.010 307.789 0.011
202312 -0.020 306.746 -0.022
202403 0.010 312.332 0.011
202406 -0.010 314.175 -0.011
202409 0.000 315.301 0.000
202412 -0.060 315.605 -0.063
202503 -0.020 319.799 -0.021
202506 -0.020 322.561 -0.020
202509 0.010 324.800 0.010
202512 -0.040 324.054 -0.041
202603 -0.040 330.213 -0.040

Add all the adjusted EPS together and divide 10 will get our e10.

Frequently Asked Questions Learn more about E10 →
What does a E10 of $-0.25 mean?
Fuel Tech (FTEK) has a E10 of $-0.25 as of Mar. 2026. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Fuel Tech and its competitors.
Is Fuel Tech's E10 too high?
Fuel Tech's current E10 is $-0.25. Overall, Fuel Tech has a GF Score™ of 63/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Fuel Tech's E10 compare to BCHT and SCWO?
Fuel Tech's E10 of $-0.25 can be compared against companies in the Industrial Products industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good E10 for an Industrial Products company?
A good E10 depends on the Industrial Products industry context. However, E10 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 E10 mean?
A high E10 can signal that a stock is expensive relative to its fundamentals. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Fuel Tech and its competitors. Fuel Tech's current E10 is $-0.25. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Fuel Tech stock overvalued right now?
Based on GuruFocus' analysis, Fuel Tech (FTEK) is currently considered Significantly Overvalued. The stock's GF Value™ is $1.13, compared to a current price of $2.15 — trading 90.3% above its estimated fair value. The current E10 is $-0.25. Fuel Tech's overall GF Score™ is 63/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is E10 calculated?
E10 is calculated from a company's financial statements. For Fuel Tech (FTEK), the current E10 is $-0.25 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 Fuel Tech (FTEK) Overvalued in 2026?

Based on GuruFocus' analysis, Fuel Tech stock appears to be overvalued. The current stock price of $2.15 is trading 90.3% above its estimated GF Value™ of $1.13. GuruFocus considers Fuel Tech to be Significantly Overvalued.

Key valuation signals for FTEK:

  • E10: $-0.25
  • GF Value™: $1.13 vs. price of $2.15 (90.3% above fair value)
  • GF Score™: 63/100 with 3 warning signs

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


Fuel Tech Business Description

Other Exchanges FUE1:Germany
Address 27601 Bella Vista Parkway, Warrenville, IL, USA, 60555-1617
Fuel Tech Inc is a technology provider of boiler optimization, efficiency improvement, and air pollution reduction to utility and industrial customers. The company operates in two segments, Air Pollution Control and Fuel Chem. The Air Pollution Control technology segment includes technologies to reduce NOx emissions in flue gas from boilers, incinerators, furnaces, and other stationary combustion sources. The Fuel Chem technology segment uses chemical processes in combination with Computational Fluid Dynamics and Chemical Kinetics Modeling for boiler modeling for the control of slagging, fouling, corrosion, opacity and other sulfur trioxide-related issues in furnaces and boilers through the addition of chemicals into the furnace using TIFI Targeted In-Furnace Injection technology.
63GF Score

Get the complete analysis for FTEK

E10 is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

$2.15
Price
$1.13
GF Value