Want more information on investing? Take a look at TheStreet.com's investing basics at www.thestreet.com/basics.

You can find out more about the efficient frontier on the Web at www.efficientfrontier.com.

www.quicken.com is a great site for stock info.

For more on risk and diversification, visit www.investopedia.com/university.

For more on beta, visit moneycentral.msn.com.

Betas are easy to find on the Web. Try finance.yahoo.com and money.cnn.com.

For more on CAPM and the equity risk premium, visit www.investopedia.com/terms/c/capm.asp.