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As of today, Comerica Inc's current share price is $49.92. Comerica Inc's E10 for the quarter that ended in Mar. 2014 was $1.53. Comerica Inc's Shiller P/E Ratio for today is 32.50.
During the past 13 years, Comerica Inc's highest Shiller P/E Ratio was 34.23. The lowest was 3.09. And the median was 12.65.
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.
Comerica Inc's adjusted earnings per share data for the three months ended in Mar. 2014 was $0.740. 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 $1.53 for the trailing six years ended in Mar. 2014.
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.
Comerica Inc's Shiller P/E Ratio for today is calculated as
|Shiller P/E Ratio||=||Share Price||/||E10|
Comerica Inc's E10 for the fiscal year that ended in Dec13 is calculated as:
For example, Comerica Inc's adjusted earnings per share data for the three months ended in Mar. 2014 was:
|Adj_EPS||=||Earnigns per Share||/||CPI of Mar. 2014||*||CPI of Current|
Since most companies do not have as long as 10 years history, here we use 6 years to calculate:
Current CPI = 239.556.
Comerica Inc Quarterly Data
|per share eps||0.482||0.660||0.730||0.610||0.688||0.700||0.760||0.780||0.615||0.730|
|per share eps||-0.110||-0.100||-0.416||-0.460||0.390||0.330||0.531||0.570||0.530||0.510|
|per share eps||0.370||0.190||-0.007||-0.160|
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.
Comerica Inc Annual Data
Comerica Inc Quarterly Data