Possible Clues:

• The 'Big Board,' on Wall Street
• Cousin of NASDAQ
• It has a floor on Wall St.
• Where Loews is 'L'
• Where to buy GM and GE
• It lists G.M. and I.B.M
• The "Big Board," on Wall Street
• Where "F" means "Ford"
• Share trading org
• CNBC subj