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Alcoa Inc (NYSE:AA)
Shiller P/E Ratio
21.79 (As of Today)

As of today, Alcoa Inc's current share price is $10.46. Alcoa Inc's E10 for the quarter that ended in Jun. 2015 was $0.48. Alcoa Inc's Shiller P/E Ratio for today is 21.79.

AA' s 10-Year Shiller P/E Ratio Range
Min: 3.5   Max: 30.82
Current: 21.59


During the past 13 years, Alcoa Inc's highest Shiller P/E Ratio was 30.82. The lowest was 3.50. And the median was 15.45.

AA's Shiller P/E Ratiois ranked lower than
61% of the 171 Companies
in the Global Aluminum industry.

( Industry Median: 12.47 vs. AA: 21.59 )

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.

Alcoa Inc's adjusted earnings per share data for the three months ended in Jun. 2015 was $0.100. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $0.48 for the trailing ten years ended in Jun. 2015.


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.

Alcoa Inc's Shiller P/E Ratio for today is calculated as

Shiller P/E Ratio=Share Price/E10

* All numbers are in millions except for per share data and ratio. All numbers are in their own currency.

Alcoa Inc's E10 for the fiscal year that ended in Dec14 is calculated as:

For example, Alcoa Inc's adjusted earnings per share data for the three months ended in Jun. 2015 was:

Adj_EPS=Earnigns per Share/CPI of Jun. 2015 (Change)*Current CPI (Jun. 2015)

Current CPI (Jun. 2015) = 238.638.

Alcoa Inc Quarterly Data

per share eps 0.130-0.1100.020-2.180-0.1600.1200.1200.1310.1400.100
CPI 232.773233.504234.149233.049236.293238.343238.031234.812236.119238.638
Adj_EPS 0.133-0.1120.020-2.232-0.1620.1200.1200.1330.1410.100
per share eps 0.0600.2500.2700.2800.150-0.1800.0900.000-0.1300.221
CPI 218.439219.179223.467225.722226.889225.672229.392229.478231.407229.601
Adj_EPS 0.0660.2720.2880.2960.158-0.1900.0940.000-0.1340.230
per share eps 0.3700.6600.330-1.492-0.610-0.4700.080-0.284-0.2000.130
CPI 213.528218.815218.783210.228212.709215.693215.969215.949217.631217.965
Adj_EPS 0.4140.7200.360-1.694-0.684-0.5200.088-0.314-0.2190.142
per share eps 0.3300.2530.6900.8500.6100.4080.7500.8100.6300.749
CPI 198.800196.800199.800202.900202.900201.800205.352208.352208.490210.036
Adj_EPS 0.3960.3070.8241.0000.7170.4820.8720.9280.7210.851

Add all the adjusted EPS together and divide 10 will get our E10.


Compared with the regular P/E ratio, which works poorly for cyclical businesses, the Shiller P/E 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 P/E should give similar results to regular P/E.

Compared with the P/S ratio, the Shiller P/E makes the comparison between different industries more meaningful.

Be Aware

The Shiller P/E 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, the Shiller P/E and P/S ratio will give false valuations.

Related Terms

P/E Ratio, P/B Ratio, P/S Ratio, Price-to-Free-Cash-Flow ratio, E10

Historical Data

* All numbers are in millions except for per share data and ratio. All numbers are in their own currency.

Alcoa Inc Annual Data

ShillerPE 21.3719.5920.977.1812.4313.948.118.2114.8028.35

Alcoa Inc Quarterly Data

ShillerPE 7.977.648.2614.8019.6124.1627.3928.3524.2123.02
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