Google parent Alphabet was one of the best-performing stocks in the S&P 500 Monday. Cheng Xin / Getty Images Close Major U.S. equities indexes were mixed and little changed at midday Monday ahead of a slew of earnings reports from big retailers and tech companies expected later this week. The S&P 500 and Nasdaq were slightly higher, while the Dow edged lower. Alphabet (GOOG, GOOGL) shares surged after Berkshire Hathaway (BRK.A, BRK.B) revealed a stake in the owner of Google and YouTube. Separately, YouTub ...