Study after study has shown that stocks with low price-to-earnings multiples significantly outperform high P/E stocks. Research from my favorite investing guru, NYU professor Aswath Damodaran, pegged the outperformance at anywhere from 9% to 12% per year, depending on the study period. That's big money we're talking about.

But you already know that you can't just go out and buy the stocks with the lowest multiples. Companies can trade at dirt-cheap prices for a number of dire reasons, including low growth prospects, skepticism about earnings, or high risk of filing for bankruptcy protection.

These dangerous stocks can quickly crater. Buy too many of them, and you'll increase your own risk of bankruptcy.

Thus, for a company to be truly undervalued, Damodaran says in his book Investment Fables, "You need to get a mismatch: a low price-to-earnings ratio without the stigma of high risk or poor growth."

Of course, you're unlikely to find any high-growth, low-P/E companies out there. But Damodaran suggests setting a reasonable minimum threshold for earnings growth, such as 5%. There are also various ways to minimize risk, including staying away from volatile stocks or companies with dangerous balance sheets.

The screen's the thing
We're looking for companies with low price-to-earnings multiples, but also a relatively low amount of risk and the potential for reasonable growth. Our screen today will cover the best value plays in the oil patch, or what my Capital IQ screener calls the "Energy Equipment and Services" industry.

There are 54 such companies with market caps topping $500 million on major U.S. exchanges. They have an average forward P/E of 24.1. Here are my parameters:

  1. To stay away from bankruptcy risk, I used Damodaran's suggestion and only considered companies with total debt less than 60% of capital.
  2. In hopes of capturing a reasonable amount of growth, I looked at Capital IQ's long-term estimates and kept only companies expected to grow EPS at 5% annually or better over the next five years. Furthermore, I required at least 5% annualized growth over the past five years.

Only 13 companies passed the screen, and I've sorted them below by their forward price-to-earnings multiple:

Company

Market Cap
(in Millions)

Forward P/E

Debt to Capital

Estimated EPS
Growth

RPC (NYSE: RES)

$3,466

9.2

21%

18%

Complete Production Services

$3,055

10.6

41%

16%

Atwood Oceanics (NYSE: ATW)

$3,043

11.7

23%

11%

Ensco (NYSE: ESV)

$7,656

11.9

31%

7%

Diamond Offshore Drilling (NYSE: DO)

$9,352

13.4

27%

18%

Helmerich & Payne

$7,315

15.5

10%

9%

National Oilwell Varco (NYSE: NOV)

$33,820

16.2

3%

13%

Cameron International

$13,450

17.1

29%

15%

Schlumberger (NYSE: SLB)

$121,726

18.8

23%

20%

Dresser-Rand (NYSE: DRC)

$4,203

19.7

45%

7%

FMC Technologies

$10,842

22.1

23%

15%

Dril-Quip

$2,818

23.6

0%

12%

Core Laboratories

$5,023

24.5

26%

22%

Source: Capital IQ, a division of Standard & Poor's.

There are lots of good research candidates here. To further stack the odds on your side, Damodaran says you can eliminate any companies that have restated earnings or had more than two large restructuring charges over the past five years. And if volatile swings in price cause you to lose sleep, consider only companies with betas less than 1.

For more on this industry, you may be interested in our research report "The Only Energy Stock You'll Ever Need." Click here to claim your free copy.