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As of today, Adtran Inc's current share price is $19.32. Adtran Inc's E10 for the quarter that ended in Dec. 2015 was $1.20. Adtran Inc's Shiller P/E Ratio for today is 16.10.
During the past 13 years, Adtran Inc's highest Shiller P/E Ratio was 43.94. The lowest was 11.59. And the median was 20.77.
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.
Adtran Inc's adjusted earnings per share data for the three months ended in Dec. 2015 was $0.115. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $1.20 for the trailing ten years ended in Dec. 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.
Adtran Inc's Shiller P/E Ratio for today is calculated as
|Shiller P/E Ratio||=||Share Price||/||E10|
Adtran Inc's E10 for the fiscal year that ended in Dec15 is calculated as:
For example, Adtran Inc's adjusted earnings per share data for the three months ended in Dec. 2015 was:
|Adj_EPS||=||Earnigns per Share||/||CPI of Dec. 2015 (Change)||*||Current CPI (Dec. 2015)|
Current CPI (Dec. 2015) = 236.525.
Adtran Inc Quarterly Data
|per share eps||0.204||0.170||0.260||0.210||0.172||0.060||0.050||0.140||0.115||0.100|
|per share eps||0.560||0.560||0.483||0.200||0.330||0.150||0.063||0.130||0.170||0.280|
|per share eps||0.266||0.240||0.300||0.340||0.292||0.290||0.440||0.500||0.557||0.520|
|per share eps||0.270||0.330||0.240||0.240||0.280||0.310||0.271||0.260||0.340||0.350|
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.
The Shiller P/E assumes that over the long term, businesses and profitability revert to their means. If a companys business model does not work in the future compared with the past, the Shiller P/E and P/S ratio will give false valuations.
Adtran Inc Annual Data
Adtran Inc Quarterly Data