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BOSTON (

TheStreet

) -- The following mid-cap companies have market values between $500 million and $10 billion and receive "buy" ratings from our proprietary quantitative model, which considers more than 60 factors. The stocks are ordered by their potential to appreciate.

Church & Dwight

(CHD) - Get Report

sells household products, including Arm & Hammer Baking Soda and Brillo Pads, worldwide.

The numbers

: Second-quarter revenue increased 5% to $623 million as net income increased 27% to $58 million and earnings per share climbed 23% to 88 cents, restrained by a higher share count. The operating margin ascended from 14% to 16% and the net margin advanced past 9%. A quick ratio of 1.2 demonstrates ample liquidity and a debt-to-equity ratio of 0.5 indicates conservative leverage.

The stock

: Church & Dwight is up 5% in 2009, underperforming major U.S. indices. The stock trades at an expensive price-to-earnings ratio of 19 and offers a dividend yield below 1%. The company's record of consistent earnings growth regardless of economic conditions makes it an attractive investment.

Strayer Education

(STRA) - Get Report

is a for-profit post-secondary education company.

The numbers

: Second-quarter net income climbed 29% to $28 million and earnings per share jumped 33% to $2 as revenue increased 29% to $126 million. The operating margin climbed from 34% to 36% and the net margin remained steady at 22%. Strayer has no debt or interest expenses. And a quick ratio of 1.6 indicates strong liquidity.

The stock

: Strayer is flat in 2009, underperforming major U.S. indices. The stock trades at an expensive price-to-earnings ratio of 32 and offers a dividend yield below 1%. Strayer will capitalize on recessionary pressures as Americans seek to broaden their skills in order to appeal to employers.

Landauer

(LDR)

provides analytical services to determine occupational and environmental radiation exposure.

The numbers

: Fiscal third-quarter earnings rose 13% to $6.5 million, or 70 cents a share, as revenue jumped 7% to $23 million. The operating margin hovered above 38% and the net margin improved to 29%. Landauer has an ideal financial position. Its balance sheet houses $32 million of cash, translating to a quick ratio of 1.6, and the company has financed itself entirely with equity, so it has no debt or interest expenses.

The stock

: Landauer is down 20% in 2009, underperforming major U.S. indices. The stock trades at an expensive price-to-earnings ratio of 23, but offers an attractive 3.6% dividend yield.

Pegasystems

(PEGA) - Get Report

sells software to automate business processes.

The numbers

: Second-quarter net income surged 294% to $11.2 million and earnings per share increased 275% to 30 cents as revenue rose 25% to $64 million. The operating margin widened from 5% to 18% and the net margin stretched from 6% to 18%. Pegasystems has an outstanding liquidity position, which is evident in its quick ratio of 3.9, and has no debt or interest expenses.

The stock

: Pegasystems has rocketed 146% in 2009, trouncing major U.S. indices. The stock trades at an exorbitant price-to-earnings ratio of 46 and offers a dividend yield below 1%. By comparison, companies in the S&P 500 pay an average dividend yield of 3.6%. Automation software reduces corporate expenses and has a high appeal during recessions.

J&J Snack Foods

(JJSF) - Get Report

distributes snack foods and frozen beverages throughout the U.S.

The numbers

: Fiscal third-quarter revenue increased 2% to $180 million as earnings improved 38% to $15 million, or 80 cents a share. The operating margin climbed from 10% to 14% and the net margin increased from 6% to 8%. Over $81 million of cash reserves and a quick ratio of 1.9 demonstrate ample liquidity. And the company holds minimal debt.

The stock

: J&J Snack has climbed 19% in 2009, outpacing the Dow and S&P 500. The stock trades at an expensive price-to-earnings ratio of 21 and offers a dividend yield below 1%.

TSC Ratings was given an award this year for "Best Stock Selection" among independent research providers by BNY ConvergEx Group. A rating can be viewed for any stock through our

screener

. Ratings are derived from a variety of fundamental and pricing figures and represent our opinion of risk-adjusted performance. However, the rating doesn't incorporate all factors that can alter a stock's performance.

-- Reported by Jake Lynch in Boston.