U.S. stock markets post gains
Tech and consumer sectors point to start of good shopping season
U.S. stocks close lower after shortened session
U.S. stock markets closed for Thanksgiving holiday
U.S. markets finished mixed
Dow drops more than 550 points
U.S. markets tumble as technology sector weakens
Oil posts sixth straight week of falling prices
Dow, Nasdaq post triple-digit gains
Dow drops 200 points