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Forest Laboratories Inc (NYSE:FRX)
E10
\$2.22 (As of Mar. 2014)

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.

Forest Laboratories Inc's adjusted earnings per share data for the three months ended in Mar. 2014 was \$0.194. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is \$2.22 for the trailing ten years ended in Mar. 2014.

As of today, Forest Laboratories Inc's current stock price is \$99.00. Forest Laboratories Inc's E10 for the quarter that ended in Mar. 2014 was \$2.22. Forest Laboratories Inc's Shiller P/E Ratio of today is 44.59.

Definition

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. When we calculate the today's Shiller P/E ratio of a stock, we use todays price divided by E10.

What is E10? How do we calculate E10?

E10 is the average of the inflation adjusted earnings of a company over the past 10 years. Lets use an example to explain.

If we want to calculate the E10 of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the earnings from 2001 through 2010.

We adjusted the earnings of 2001 earnings data with the total inflation from 2001 through 2010 to the equivalent earnings in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart earned \$1 a share in 2001, then the 2001s equivalent earnings in 2010 is \$1.4 a share. If Wal-Mart earns \$1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 earnings in 2010 is \$1.35. So on and so forth, you get the equivalent earnings of past 10 years. Then you add them together and divided the sum by 10 to get E10.

For example, Forest Laboratories 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 (Change) * Current CPI (Mar. 2014) = 0.194 / 236.293 * 236.293 = 0.194

Current CPI (Mar. 2014) = 236.293.

Forest Laboratories Inc Quarterly Data

 201112 201203 201206 201209 201212 201303 201306 201309 201312 201403 per share eps 1.04 0.718 0.21 0.08 -0.58 0.171 0.09 0.26 0.07 0.194 CPI 225.672 229.392 229.478 231.407 229.601 232.773 233.504 234.149 233.049 236.293 Adj_EPS 1.089 0.74 0.216 0.082 -0.597 0.174 0.091 0.262 0.071 0.194 200906 200909 200912 201003 201006 201009 201012 201103 201106 201109 per share eps 0.87 0.61 0.69 0.074 0.39 1 1.11 1.119 0.9 0.91 CPI 215.693 215.969 215.949 217.631 217.965 218.439 219.179 223.467 225.722 226.889 Adj_EPS 0.953 0.667 0.755 0.08 0.423 1.082 1.197 1.183 0.942 0.948 200612 200703 200706 200709 200712 200803 200806 200809 200812 200903 per share eps 0.78 -0.747 0.83 0.71 0.96 0.553 0.79 0.8 0.62 0.306 CPI 201.8 205.352 208.352 208.49 210.036 213.528 218.815 218.783 210.228 212.709 Adj_EPS 0.913 -0.86 0.941 0.805 1.08 0.612 0.853 0.864 0.697 0.34 200406 200409 200412 200503 200506 200509 200512 200603 200606 200609 per share eps 0.6 0.79 0.7 0.148 0.62 0.59 0.57 0.281 0.62 0.75 CPI 189.7 189.9 190.3 193.3 194.5 198.8 196.8 199.8 202.9 202.9 Adj_EPS 0.747 0.983 0.869 0.181 0.753 0.701 0.684 0.332 0.722 0.873

Add all the adjusted EPS together and divide 10 will get our e10.

Explanation

If a company grows much fast than inflation, E10 may underestimate the company's earnings power. Shiller P/E Ratio can seem to be too high even the actual P/E is low.

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.

Forest Laboratories Inc's Shiller P/E Ratio of today is calculated as

 Shiller P/E Ratio = Share Price / E10 = 99.00 / 2.22 = 44.59

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

Be Aware

Shiller P/E Ratio works better for cyclical companies. It gives you a better idea on the company's real earnings power.

Related Terms

Shiller P/E Ratio

Historical Data

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

Forest Laboratories Inc Annual Data

 Mar05 Mar06 Mar07 Mar08 Mar09 Mar10 Mar11 Mar12 Mar13 Mar14 e10 1.35 1.68 1.85 2.25 2.34 2.39 2.61 2.89 2.66 2.22

Forest Laboratories Inc Quarterly Data

 Dec11 Mar12 Jun12 Sep12 Dec12 Mar13 Jun13 Sep13 Dec13 Mar14 e10 2.77 2.89 2.81 2.71 2.44 2.66 2.52 2.43 2.26 2.22
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