Numbers can lie -- but they're the best first step in determining whether a stock is a buy. In this series, we use some carefully chosen metrics to size up a stock's true value based on the following clues:

  • The current price multiples.
  • The consistency of past earnings and cash flow.
  • How much growth we can expect.

Let's see what those numbers can tell us about how expensive or cheap Select Comfort (Nasdaq: SCSS) might be.

The current price multiples
First, we'll look at most investors' favorite metric: the P/E ratio. It divides the company's share price by its earnings per share (EPS) -- the lower, the better.

Then, we'll take things up a notch with a more advanced metric: enterprise value to unlevered free cash flow. This divides the company's enterprise value (basically, its market cap plus its debt, minus its cash) by its unlevered free cash flow (its free cash flow, adding back the interest payments on its debt). Like the P/E, the lower this number is, the better.

Analysts argue about which is more important -- earnings or cash flow. Who cares? A good buy ideally has low multiples on both.

Select Comfort has a P/E ratio of 23.8 and an EV/FCF ratio of 19.8 over the trailing 12 months. If we stretch and compare current valuations to the five-year averages for earnings and free cash flow, Select Comfort has a P/E ratio of 77.3 and a five-year EV/FCF ratio of 35.5.

A positive one-year ratio under 10 for both metrics is ideal (at least in my opinion). For a five-year metric, under 20 is ideal.

Select Comfort is zero for four on hitting the ideal targets, but let's see how it compares against some competitors and industry mates. 

Company

1-Year P/E

1-Year EV/FCF

5-Year P/E

5-Year EV/FCF

Select Comfort 23.8 19.8 77.3 35.5
Sealy (NYSE: ZZ) 209.1 11.6 8.6 9.7
Tempur-Pedic (NYSE: TPX) 17.4 19.6 28.6 24.4
Ethan Allen (NYSE: ETH) 21.5 11.6 59.9 19.1

Source: S&P Capital IQ.

Numerically, we've seen how Select Comfort's valuation rates on both an absolute and relative basis. Next, let's examine ...

The consistency of past earnings and cash flow
An ideal company will be consistently strong in its earnings and cash flow generation.

In the past five years, Select Comfort's net income margin has ranged from -10.6% to 10.1%. In that same time frame, unlevered free cash flow margin has ranged from -6% to 13.8%.

How do those figures compare with those of the company's peers? See for yourself:

Source: S&P Capital IQ; margin ranges are combined.

Additionally, over the last five years, Select Comfort has tallied up three years of positive earnings and four years of positive free cash flow.

Next, let's figure out ...

How much growth we can expect
Analysts tend to comically overstate their five-year growth estimates. If you accept them at face value, you will overpay for stocks. But while you should definitely take the analysts' prognostications with a grain of salt, they can still provide a useful starting point when compared to similar numbers from a company's closest rivals.

Let's start by seeing what this company's done over the past five years. Due to losses, Select Comfort's trailing EPS growth rate isn't meaningful, but let's see what its peers did:

Source: S&P Capital IQ; EPS growth shown.

And here's how it measures up with regard to the growth analysts expect over the next five years:

Source: S&P Capital IQ; estimates for EPS growth.

The bottom line
The pile of numbers we've plowed through has shown us the price multiples shares of Select Comfort are trading at, the volatility of its operational performance, and what kind of growth profile it has -- both on an absolute and a relative basis.

The more consistent a company's performance has been and the more growth we can expect, the more we should be willing to pay. We've gone well beyond looking at a moderately high 23.8 P/E ratio and we see a slightly lower but still high EV/FCF ratio. None of its peers are exceedingly cheap either, but Sealy and Ethan Allen have pretty low EV/FCF multiples. Select Comfort's five-year multiples are worse than its one-year multiples, especially compared to Sealy's and Ethan Allen's.

Looking at profitability over the last five years, Select Comfort has had a bumpy ride in a tough economy. Of its peers, only Tempur-Pedic has managed to stay profitable consistently on both an earnings and free cash flow basis.

Bedding isn't going away anytime soon, but macro events greatly influence the timing of purchases. Select Comfort's stock is selling at a premium to profitability right now, so you'd have to believe in serious bottom-line improvement to buy it.

If you find Select Comfort's numbers or story compelling, don't stop. Continue your due diligence process until you're confident one way or the other. As a start, add it to My Watchlist to find all of our Foolish analysis.

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