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Tellabs, Inc. (NAS:TLAB)
Shiller P/E Ratio
(As of Today)

As of today, Tellabs, Inc.'s current share price is \$2.44. Tellabs, Inc.'s E10 for the quarter that ended in Sep. 2013 was \$-0.49. Tellabs, Inc.'s Shiller P/E Ratio for today is .

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.

Tellabs, Inc.'s adjusted earnings per share data for the three months ended in Sep. 2013 was \$-0.030. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is \$-0.49 for the trailing ten years ended in Sep. 2013.

Definition

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.

Tellabs, Inc.'s Shiller P/E Ratio for today is calculated as

 Shiller P/E Ratio = Share Price / E10 = 2.44 / -0.49 =

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

Tellabs, Inc.'s E10 for the fiscal year that ended in Dec12 is calculated as:

For example, Tellabs, Inc.'s adjusted earnings per share data for the three months ended in Sep. 2013 was:

 Adj_EPS = Earnigns per Share / CPI of Sep. 2013 (Change) * Current CPI (Sep. 2013) = -0.03 / 234.149 * 234.149 = -0.030

Current CPI (Sep. 2013) = 234.149.

Tellabs, Inc. Quarterly Data

 201106 201109 201112 201203 201206 201209 201212 201303 201306 201309 per share eps -0.06 -0.38 -0.016 -0.38 -0.01 -0.01 -0.063 -0.16 -0.02 -0.03 CPI 225.722 226.889 225.672 229.392 229.478 231.407 229.601 232.773 233.504 234.149 Adj_EPS -0.062 -0.392 -0.017 -0.388 -0.01 -0.01 -0.064 -0.161 -0.02 -0.03 200812 200903 200906 200909 200912 201003 201006 201009 201012 201103 per share eps 0.032 0.02 0.04 0.07 0.16 0.12 0.16 0.15 -0.03 -0.07 CPI 210.228 212.709 215.693 215.969 215.949 217.631 217.965 218.439 219.179 223.467 Adj_EPS 0.036 0.022 0.043 0.076 0.173 0.129 0.172 0.161 -0.032 -0.073 200606 200609 200612 200703 200706 200709 200712 200803 200806 200809 per share eps 0.12 0.13 0.065 0.06 0.07 0.01 0.015 0.04 0.1 -2.51 CPI 202.9 202.9 201.8 205.352 208.352 208.49 210.036 213.528 218.815 218.783 Adj_EPS 0.138 0.15 0.075 0.068 0.079 0.011 0.017 0.044 0.107 -2.686 200312 200403 200406 200409 200412 200503 200506 200509 200512 200603 per share eps -0.056 0.03 0.12 0.11 -0.32 0.002 0.09 0.09 0.203 0.11 CPI 184.3 187.4 189.7 189.9 190.3 193.3 194.5 198.8 196.8 199.8 Adj_EPS -0.071 0.037 0.148 0.136 -0.394 0.002 0.108 0.106 0.242 0.129

Add all the adjusted EPS together and divide 10 will get our E10.

Explanation

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.

Be Aware

The Shiller P/E assumes that over the long term, businesses and profitability revert to their means. If a companys business model does not work in the future compared with the past, the Shiller P/E and P/S ratio will give false valuations.

Related Terms

Historical Data

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

Tellabs, Inc. Annual Data

 Dec03 Dec04 Dec05 Dec06 Dec07 Dec08 Dec09 Dec10 Dec11 Dec12 ShillerPE 18.39 33.30 188.89 -50.55 -66.30 -12.61 -32.61 -71.00 -15.64 0.00

Tellabs, Inc. Quarterly Data

 Jun11 Sep11 Dec11 Mar12 Jun12 Sep12 Dec12 Mar13 Jun13 Sep13 ShillerPE -33.41 -19.65 -15.64 -11.67 -8.97 -8.79 0.00 0.00 0.00 0.00
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