Retail Investors Getting Bullish: TD Ameritrade's Tomczyk By: CNBC.com News March 12, 2013 at 17:49 PM EDT So far in 2013, investors have increased stock market positions by $12 billion, according to data from clients, TD Ameritrade CEO Fred Tomczyk says. Read More >> Related Stocks: Apple Bristol-Myers Squibb Facebook General Electric Intel Corp JPMorgan Chase & Co Netflix