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As of today, Allergan PLC's current share price is $274.40. Allergan PLC's E10 for the quarter that ended in Sep. 2015 was $0.47. Allergan PLC's Shiller P/E Ratio for today is 583.83.
During the past 13 years, Allergan PLC's highest Shiller P/E Ratio was 817.85. The lowest was 14.67. And the median was 47.12.
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.
Allergan PLC's adjusted earnings per share data for the three months ended in Sep. 2015 was $13.290. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $0.47 for the trailing ten years ended in Sep. 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.
Allergan PLC's Shiller P/E Ratio for today is calculated as
|Shiller P/E Ratio||=||Share Price||/||E10|
Allergan PLC's E10 for the fiscal year that ended in Dec14 is calculated as:
For example, Allergan PLC's adjusted earnings per share data for the three months ended in Sep. 2015 was:
|Adj_EPS||=||Earnigns per Share||/||CPI of Sep. 2015 (Change)||*||Current CPI (Sep. 2015)|
Current CPI (Sep. 2015) = 237.945.
Allergan PLC Quarterly Data
|per share eps||-4.270||0.490||-0.700||0.550||0.280||-3.950||-3.030||-1.850||-0.800||13.290|
|per share eps||0.140||0.360||0.420||0.540||0.750||0.430||-0.490||0.600||0.220||-0.790|
|per share eps||0.530||0.620||0.490||0.430||0.460||0.550||0.510||0.570||0.570||0.210|
|per share eps||0.200||0.230||-0.150||0.310||-4.800||0.290||0.330||0.310||0.340||0.450|
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.
Allergan PLC Annual Data
Allergan PLC Quarterly Data