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As of today, NRG Energy Inc's current share price is $22.89. NRG Energy Inc's E10 for the quarter that ended in Mar. 2015 was $0.92. NRG Energy Inc's Shiller P/E Ratio for today is 24.88.
During the past 13 years, NRG Energy Inc's highest Shiller P/E Ratio was 251.39. The lowest was 5.01. And the median was 15.16.
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.
NRG Energy Inc's adjusted earnings per share data for the three months ended in Mar. 2015 was $-0.371. Since most companies do not have as long as 10 years history, here we use 6 years to calculate. Add all the adjusted EPS for the past 6 years together and divide 6 will get our E10, which is $0.92 for the trailing six years ended in Mar. 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.
NRG Energy Inc's Shiller P/E Ratio for today is calculated as
|Shiller P/E Ratio||=||Share Price||/||E10|
NRG Energy Inc's E10 for the fiscal year that ended in Dec14 is calculated as:
For example, NRG Energy Inc's adjusted earnings per share data for the three months ended in Mar. 2015 was:
|Adj_EPS||=||Earnigns per Share||/||CPI of Mar. 2015||*||CPI of Current|
Since most companies do not have as long as 10 years history, GuruFocus uses 6 years to do the calculation.
Current CPI = 236.959.
NRG Energy Inc Quarterly Data
|per share eps||1.016||-1.030||0.370||0.360||-0.926||-0.180||-0.300||0.480||0.205||-0.370|
|per share eps||0.810||0.870||-0.069||-1.060||2.530||-0.240||-0.481||-0.920||1.080||-0.010|
|per share eps||1.560||1.020||0.103||0.220|
Add all the adjusted EPS together and divide 6 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.
NRG Energy Inc Annual Data
NRG Energy Inc Quarterly Data