Iamgold (STU:IAL) Shiller PE Ratio: (As of Sep. 22, 2026)

Author: Vera Yuan Vera Yuan
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Director of Data and Quant Analytics at GuruFocus
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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.

STU:IAL Iamgold Corp STU:IAL
86 GF Score
Price €17.69
GF Value €11.89
Valuation Significantly Overvalued
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What is Iamgold Shiller PE Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Iamgold  (STU:IAL) 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.


Iamgold Shiller PE Ratio Related Terms


Iamgold Shiller PE Ratio Historical Data

* Premium members only.

The historical data trend for Iamgold'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.

Iamgold Shiller PE Ratio Chart

Iamgold 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 - - - - 59.44

Iamgold Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 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 - - 887.81 58.14 46.06

STU:IAL vs NEM, AU: Shiller PE Ratio Comparison

For the Gold subindustry, Iamgold'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.


Iamgold Shiller PE Ratio vs Metals & Mining Industry

For the Metals & Mining industry and Basic Materials sector, Iamgold's Shiller PE Ratio distribution charts can be found below:

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


STU:IAL
86GF Score
Iamgold Corp STU:IAL
Shiller PE Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Iamgold 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.

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

For example, Iamgold'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)
=0.3402/133.5265*133.5265
=0.340

Current CPI (Jun. 2026) = 133.5265.

Iamgold Quarterly Data

Earnings per Share (Diluted) CPI Adj_EPS
201606 -0.027 102.002 -0.035
201609 0.036 101.765 0.047
201612 -0.009 101.449 -0.012
201703 -0.038 102.634 -0.049
201706 0.981 103.029 1.272
201709 0.060 103.345 0.077
201712 -0.034 103.345 -0.044
201803 0.073 105.004 0.093
201806 -0.050 105.557 -0.064
201809 -0.018 105.636 -0.022
201812 -0.065 105.399 -0.083
201903 -0.078 106.979 -0.097
201906 -0.027 107.690 -0.034
201909 -0.006 107.611 -0.007
201912 -0.682 107.769 -0.845
202003 -0.066 107.927 -0.082
202006 0.049 108.401 0.060
202009 -0.021 108.164 -0.026
202012 0.103 108.559 0.127
202103 0.034 110.298 0.041
202106 -0.008 111.720 -0.009
202109 -0.134 112.905 -0.158
202112 -0.356 113.774 -0.418
202203 0.044 117.646 0.050
202206 -0.019 120.806 -0.021
202209 -0.225 120.648 -0.248
202303 0.023 122.702 0.025
202306 0.176 124.203 0.189
202309 -0.002 125.230 -0.002
202312 -0.018 125.072 -0.019
202403 0.102 126.258 0.108
202406 0.148 127.522 0.155
202409 0.937 127.285 0.983
202412 0.141 127.364 0.147
202503 0.065 129.181 0.067
202506 0.120 129.892 0.123
202509 0.205 130.287 0.210
202512 0.601 130.366 0.616
202603 0.546 132.262 0.552
202606 0.340 133.527 0.340

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 Iamgold (STU:IAL) Overvalued in 2026?

Based on GuruFocus' analysis, Iamgold stock appears to be overvalued. The current stock price of €17.69 is trading 48.8% above its estimated GF Value™ of €11.89. GuruFocus considers Iamgold to be Significantly Overvalued.

Key valuation signals for STU:IAL:

  • Shiller PE Ratio:
  • GF Value™: €11.89 vs. price of €17.69 (48.8% above fair value)
  • GF Score™: 86/100

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


Iamgold Business Description

Other Exchanges IAG:USA0XGN:UKIMG:Canada
Address 150 King Street West, Suite 2200, Toronto, ON, CAN, M5H 1J9
Iamgold Corp is a mid-tier gold mining company. The company operating gold mines are divided into geographic segments such as Cote Gold mine - Canada, Burkina Faso - Essakane mine, Westwood mine - Canada. The company's s non-gold mine segments are Exploration and evaluation and development, and Corporate - which includes royalty interests. The company generates the majority of its revenue from the Cote Gold mine segment.
86GF Score

Get the complete analysis for STU:IAL

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

€17.69
Price
€11.89
GF Value