NAII (Natural Alternatives International) E10: $0.37 (As of Mar. 2026)


NAII Natural Alternatives International Inc NAII
49 GF Score
Price $2.49
GF Value $5.31
Valuation Possible Value Trap
! 5 Warning Signs
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What is Natural Alternatives International E10?

Natural Alternatives International NAII +2.47% 49 E10 is $0.37 as of Mar. 2026. GuruFocus rates NAII with a GF Score™ of 49/100 and a GF Value™ of $5.31 (Possible Value Trap). The stock has 5 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.

Natural Alternatives International's adjusted earnings per share data for the three months ended in Mar. 2026 was $-0.720. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is $0.37 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Natural Alternatives International's average E10 Growth Rate was -50.00% per year. During the past 3 years, the average E10 Growth Rate was -14.30% per year. During the past 5 years, the average E10 Growth Rate was -0.30% per year. During the past 10 years, the average E10 Growth Rate was 13.00% 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 Natural Alternatives International was 61.30% per year. The lowest was -50.00% per year. And the median was 8.50% per year.

As of today (2026-06-25), Natural Alternatives International's current stock price is $2.49. Natural Alternatives International's E10 for the quarter that ended in Mar. 2026 was $0.37. Natural Alternatives International's Shiller PE Ratio of today is 6.73.

During the past 13 years, the highest Shiller PE Ratio of Natural Alternatives International was 43.28. The lowest was 3.75. And the median was 11.49.


Natural Alternatives International  (NAS:NAII) 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.

Natural Alternatives International's Shiller P/E Ratio of today is calculated as

Shiller PE Ratio=Share Price/E10
=2.49/0.37
=6.73

* 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.

During the past 13 years, the highest Shiller P/E Ratio of Natural Alternatives International was 43.28. The lowest was 3.75. And the median was 11.49.


Be Aware

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


Natural Alternatives International E10 Related Terms


Natural Alternatives International E10 Historical Data

* Premium members only.

The historical data trend for Natural Alternatives International'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.

Natural Alternatives International E10 Chart

Natural Alternatives International Annual Data
Trend Jun16 Jun17 Jun18 Jun19 Jun20 Jun21 Jun22 Jun23 Jun24 Jun25
E10
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.79 0.97 1.01 0.88 0.61

Natural Alternatives International 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 0.74 0.61 0.58 0.50 0.37

NAII vs CTGL, COOT, FAMI: E10 Comparison

For the Packaged Foods subindustry, Natural Alternatives International'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.


Natural Alternatives International Shiller PE Ratio vs Consumer Packaged Goods Industry

For the Consumer Packaged Goods industry and Consumer Defensive sector, Natural Alternatives International's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where Natural Alternatives International's Shiller PE Ratio falls into.


NAII
49GF Score
Natural Alternatives International Inc NAII
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Natural Alternatives International 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, Natural Alternatives International'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)
=-0.72/330.2130*330.2130
=-0.720

Current CPI (Mar. 2026) = 330.2130.

Natural Alternatives International Quarterly Data

per share eps CPI Adj_EPS
201606 0.520 241.018 0.712
201609 0.370 241.428 0.506
201612 0.370 241.432 0.506
201703 0.110 243.801 0.149
201706 0.230 244.955 0.310
201709 0.210 246.819 0.281
201712 -0.200 246.524 -0.268
201803 0.300 249.554 0.397
201806 0.410 251.989 0.537
201809 0.370 252.439 0.484
201812 0.310 251.233 0.407
201903 0.270 254.202 0.351
201906 -0.030 256.143 -0.039
201909 0.010 256.759 0.013
201912 0.070 256.974 0.090
202003 -0.610 258.115 -0.780
202006 0.260 257.797 0.333
202009 0.350 260.280 0.444
202012 0.570 260.474 0.723
202103 0.300 264.877 0.374
202106 0.470 271.696 0.571
202109 0.510 274.310 0.614
202112 0.300 278.802 0.355
202203 0.410 287.504 0.471
202206 0.520 296.311 0.579
202209 0.180 296.808 0.200
202212 0.310 296.797 0.345
202303 -0.410 301.836 -0.449
202306 0.350 305.109 0.379
202309 -0.120 307.789 -0.129
202312 -0.520 306.746 -0.560
202403 -0.270 312.332 -0.285
202406 -0.320 314.175 -0.336
202409 -0.330 315.301 -0.346
202412 -0.370 315.605 -0.387
202503 -0.370 319.799 -0.382
202506 -1.210 322.561 -1.239
202509 -0.050 324.800 -0.051
202512 -0.420 324.054 -0.428
202603 -0.720 330.213 -0.720

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 $0.37 mean?
Natural Alternatives International (NAII) has a E10 of $0.37 as of Mar. 2026. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on Natural Alternatives International and its competitors.
Is Natural Alternatives International's E10 too high?
Natural Alternatives International's current E10 is $0.37. Overall, Natural Alternatives International has a GF Score™ of 49/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does Natural Alternatives International's E10 compare to CTGL and COOT?
Natural Alternatives International's E10 of $0.37 can be compared against companies in the Consumer Packaged Goods 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 a Consumer Packaged Goods company?
A good E10 depends on the Consumer Packaged Goods 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 Natural Alternatives International and its competitors. Natural Alternatives International's current E10 is $0.37. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Natural Alternatives International stock overvalued right now?
Based on GuruFocus' analysis, Natural Alternatives International (NAII) is currently considered Possible Value Trap. The stock's GF Value™ is $5.31, compared to a current price of $2.49 — trading 53.1% below its estimated fair value. The current E10 is $0.37. Natural Alternatives International's overall GF Score™ is 49/100 with 5 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 Natural Alternatives International (NAII), the current E10 is $0.37 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 Natural Alternatives International (NAII) Overvalued in 2026?

Based on GuruFocus' analysis, Natural Alternatives International stock appears to be undervalued. The current stock price of $2.49 is trading 53.1% below its estimated GF Value™ of $5.31. GuruFocus considers Natural Alternatives International to be Possible Value Trap.

Key valuation signals for NAII:

  • E10: $0.37
  • GF Value™: $5.31 vs. price of $2.49 (53.1% below fair value)
  • GF Score™: 49/100 with 5 warning signs

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


Natural Alternatives International Business Description

Address 1535 Faraday Avenue, Carlsbad, CA, USA, 92008
Natural Alternatives International Inc is engaged in formulating, manufacturing, and marketing nutritional supplements. It offers vitamins, minerals, herbs, and other supplements, as well as other healthcare products, to customers within the United States and internationally. Its business activity is operated through Private-Label Contract Manufacturing and Patent & Trademark Licensing segments. The company derives the majority of revenue from Private-Label Contract Manufacturing, which is engaged in providing manufacturing services to companies that market and distribute nutritional supplements and other healthcare products, whereas the Patent and Trademark Licensing segment includes royalty income from its license and supply agreements associated with the sale.
49GF Score

Get the complete analysis for NAII

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

$2.49
Price
$5.31
GF Value