stocks Rigel Pharmaceuticals Inc

  • Stocks closed mixed as worries about a weakening economy and credit crunch continued to rattle the markets.

  • Cramer's got the call on Bank of America, Jones Soda, AIG and more.Investing can be confusing. Luckily, Cramer has mapped out some road rules for all you Home Gamers trying to navigate the jungle that is Wall Street. Think of it as "Mad Money 101" –- some fundamental advice to keep in mind as you play the market. Whether you're a first time investor or a seasoned financier, it's always good to remember the basics.