Dow Up 20 Percent Since QE2 Began By: CNBC.com News June 30, 2011 at 10:41 AM EDT The market's ten-month QE2 rally has been both steep and broad. In fact, every S&P 500 sector has posted a double-digit gain in the period. Related Stocks: Alcoa Bank of America Caterpillar Chevron Corp Cisco Systems Exxon Mobil Hewlett-Packard International Business Machines Merck & Co Wal-Mart Stores, Inc.