Visit http://www.yahoo.com. Under Finance, then Stock Research, and finally Historical Quotes, download the monthly returns on any four stocks for years 2000 to 2005 (or as recent a period as you can find)

and determine the portfolio that maximizes the chance of beating the S&P 500 for those years. (Note that the ticker symbol for the S&P 500 is ^SPX. Also, this Web site gives closing prices, which you will need to convert to returns.)