Blue-chip stocks may get the headlines, but some of the best opportunities for investment growth often lie with small-cap stocks, companies with a market capitalization of $2 billion or less.

Small-cap stocks, however, can also come with a degree of risk.

To learn about the basics of small-cap investing, here are a few sites worth a visit:

• Investopedia: Provides overview of small-cap versus big-cap stocks.

• InvestingAnswers: Provides the essentials of small-cap stock investing. Explores opportunities and downside to small-cap investing. Offers small- cap investing basics with stock selection checklist.

• Stock Market Investor: Contains brief overview of small-cap investing, including the disadvantages.