Here's a very short story that demonstrates one of the great principles of winning investing:

New York Yankees relief pitcher Mariano Rivera got off to a bad start last season. In the first two games, he gave up five hits and six runs to the rival Boston Red Sox. Yes, something seemed wrong with the man many believe to be the greatest reliever ever.

Seemingly human, he suddenly became trade bait in my fantasy league. I knew, however, that he was still a great pitcher, and I offered up the solid but unspectacular Troy Percival in return. The deal was done. I'd just purchased an all-star for a bargain price -- and Rivera did me proud by having another spectacular season and winning Reliever of the Year honors (yet again).

How to find your own Rivera
It's an easy-to-understand yet powerful lesson. Sometimes, good companies will take an undeserved hit, leaving you with an opportunity to buy in at bargain prices.

For example, Tom Gardner recommended Silicon Labs to Motley Fool Stock Advisor members in August 2004. A couple of months later, the integrated-circuits designer was down 6%, and Tom recommended it again. After three more months, it was down more than 15%. What did Tom do? He picked it a third time.

At one point, Silicon Labs was down more than 25% from the original recommendation. A quarter of the company's value had vanished. Was Tom worried? Well, probably, but nothing had changed his mind about the business prospects -- Rivera was still Rivera, after all -- so he continued to back the stock.

The three-step model
Tom was comfortable recommending this company three times because it fit beautifully into the following three-layer mold:

  1. An out-of-favor company with fixable problems in a beaten-down, relevant industry.
  2. Strong balance sheet.
  3. Significant insider ownership.

Stocks with this profile are often solid companies with great turnaround potential. Sooner or later, a relevant industry will reverse course and head north again; businesses with strong balance sheets will survive to see that day. Meanwhile, managers with a large stake in their business add to the probability of success, because they have heavy incentives to increase shareholder value.

Back to the SLAB
When Tom first recommended it, Silicon Labs was off some 40% from its recent highs for a few reasons; among them were misguided concerns about its inventory picture and the bloodbath in the semiconductor industry, whose index was down more than 70% from its 2000 high. The carnage was broad-based, taking down names such as United Microelectronics (NYSE:UMC), Cypress Semiconductor (NYSE:CY), and Marvell Technology (NASDAQ:MRVL).

Eventually, things would get better for the industry. Fast, efficient chips were appearing in more and more products, a trend that would continue to rocket ahead. Silicon Labs -- whose largest customers include Conexant Systems (NASDAQ:CNXT), Motorola (NYSE:MOT), and Thomson (NYSE:TMS) -- would not be left behind.

Silicon Labs' balance sheet was strong: $215 million in cash, no debt, and receivables in line with sales. Those worried about an inventory increase didn't understand that there was actually a positive inventory divergence, with a rapid buildup in raw materials and a burndown in finished goods.

The icing on the cake was that the chairman and two fellow co-founders owned a large percentage of the stock. Tom knew the trio would strive for operational excellence.

The dust settles ...
Tom isn't perfect. He has sold solid companies, Trex (NYSE:TWP) among them, and watched them rise in value afterward. But he was right about Silicon Labs, because the stock fit the three-step model ... the price sure did rebound with a fury.

Today, Silicon Labs' stock is suffering once again. The broad-based carnage has sent the price down 40% from recent highs. And although Tom's three-pick average has slightly beat out the market's 12% gains, the price is once again in attractive territory.

I don't want to oversimplify things, because there were many other factors in Tom's selection of Silicon Labs (and all of his recommendations), but the three points above led him down the right path. Silicon Labs is just one of the reasons his recommendations have a total average return of 66% since the Stock Advisor service began in 2002. David Gardner is also doing well with 37% average returns, while equal amounts invested in the S&P 500 would have returned 17%. A 30-day free trial will give you full access to every issue and all of the Gardners' recommendations. Click here for more information.

This article was originally published Feb. 2, 2006. It has been updated.

Rex Moore is hooked on Iceland skyr -- the food of the vikings. He owns no companies mentioned in this article. The Motley Fool has a disclosure policy .