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Power-One, Inc. (NAS:PWER)
Shiller P/E Ratio
(As of Today)

As of today, Power-One, Inc.'s current share price is $6.34. Power-One, Inc.'s E10 for the quarter that ended in Mar. 2013 was $0.00. Power-One, 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.

Power-One, Inc.'s adjusted earnings per share data for the three months ended in Mar. 2013 was $-0.060. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $0.00 for the trailing ten years ended in Mar. 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.

Power-One, Inc.'s Shiller P/E Ratio for today is calculated as

Shiller P/E Ratio=Share Price/E10
=6.34/0.00
=

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

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

For example, Power-One, Inc.'s adjusted earnings per share data for the three months ended in Mar. 2013 was:

Adj_EPS=Earnigns per Share/CPI of Mar. 2013 (Change)*Current CPI (Mar. 2013)
=-0.06/232.773*232.773
=-0.060

Current CPI (Mar. 2013) = 232.773.

Power-One, Inc. Quarterly Data

201012201103201106201109201112201203201206201209201212201303
per share eps 0.3780.2000.2100.2700.2400.0300.3000.130-0.141-0.060
CPI 219.179223.467225.722226.889225.672229.392229.478231.407229.601232.773
Adj_EPS 0.4010.2080.2170.2770.2480.0300.3040.131-0.143-0.060
200806200809200812200903200906200909200912201003201006201009
per share eps -0.040-0.0200.020-0.700-0.080-0.0300.0700.0400.1700.400
CPI 218.815218.783210.228212.709215.693215.969215.949217.631217.965218.439
Adj_EPS -0.043-0.0210.022-0.766-0.086-0.0320.0750.0430.1820.426
200512200603200606200609200612200703200706200709200712200803
per share eps 0.040-0.0600.0400.010-0.170-0.140-0.130-0.070-0.080-0.160
CPI 196.800199.800202.900202.900201.800205.352208.352208.490210.036213.528
Adj_EPS 0.047-0.0700.0460.011-0.196-0.159-0.145-0.078-0.089-0.174
200306200309200312200403200406200409200412200503200506200509
per share eps -0.010-0.040-0.120-0.030-0.050-0.060-0.110-0.340-0.1700.020
CPI 183.700185.200184.300187.400189.700189.900190.300193.300194.500198.800
Adj_EPS -0.013-0.050-0.152-0.037-0.061-0.074-0.135-0.409-0.2030.023

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

P/E Ratio, P/B Ratio, P/S Ratio, Price-to-Free-Cash-Flow ratio, E10


Historical Data

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

Power-One, Inc. Annual Data

Dec03Dec04Dec05Dec06Dec07Dec08Dec09Dec10Dec11Dec12
ShillerPE -14.90-10.95-6.30-6.66-5.16-3.93-10.99-75.6880.0729.80

Power-One, Inc. Quarterly Data

Dec10Mar11Jun11Sep11Dec11Mar12Jun12Sep12Dec12Mar13
ShillerPE -75.68-294.53169.19273.2480.0769.1741.7543.2629.8026.60
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