Don't settle for ordinary quarterly reports.

Every week, I take a look at three companies that beat market expectations, since I believe that it's the biggest factor in a stock beating the market. Leaving Wall Street's pros with stunned expressions can be a good thing. It usually means that the companies have more in the tank than analysts figured. Capital appreciation typically follows.

Let's take a look at a few companies that humbled the prognosticators over the past few trading days.

We can start with OCZ Technology (Nasdaq: OCZ). Analysts figured the maker of solid-state drives would post a small loss in its latest quarter. OCZ came through with an adjusted profit of $0.01 a share. Business is booming, and OCZ is pegging revenue to grow by at least 65% this year.

PriceSmart (Nasdaq: PSMT) also landed ahead of the pros. The warehouse club operator posted net income of $0.55 a share in its fiscal third quarter. Even if we back out a one-time gain related to the sale of a property in Panama, PriceSmart would have easily crushed the $0.46 a share Wall Street was expecting.

Spun off by Costco (Nasdaq: COST) in the 1990s, PriceSmart is gradually expanding its small chain of warehouse clubs through Latin America and the Caribbean.

Finally, we have Helen of Troy (Nasdaq: HELE) dolling itself up for investors. The maker of beauty-care products delivered a quarterly profit of $0.78 a share, just ahead of the $0.76 a share that analysts were looking for. Affordable vanity sells, even if Supercuts parent Regis (NYSE: RGS) checked in on Friday with negative store-level comps for its latest quarter.

It's important to keep watching the companies that surpass expectations. Over time, it will be a lucrative experience for investors as the market rewards the overachievers. That's the kind of surprise that we look for in the Rule Breakers newsletter service. Want in? Check out a 30-day trial subscription.

Either way, come back next Monday to learn about more stocks that blew the market away.

The Motley Fool owns shares of Costco. Motley Fool newsletter services have recommended buying shares of Costco. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.

Longtime Fool contributor Rick Munarriz is a fan of toppers. He does not own shares in any of the stocks in this column. He is also part of the Rule Breakers newsletter research team, seeking out tomorrow's ultimate growth stocks a day early.