U.S. shares were set to extend gains for the fourth straight session on Wednesday after a turbulent start to the year, as Google-parent Alphabet and chipmaker Advanced Micro Devices’ shares surged following strong quarterly results. Alphabet Inc. rose 8.2 percent after reporting record quarterly sales on Tuesday, and said it plans to undertake a 20-to-one stock split. The stock split should make it more appealing to retail investors, said Neil Wilson, chief market analyst for Markets.com, adding that Alphabet earnings will underpin a return in confidence in beaten down technology names. “After all the tumult of January, solid earnings can be a catalyst for gains.” Facebook-parent Meta Platforms Inc., which is set to report results on Wednesday, rose 1.0 percent, while Amazon.com Inc., slated to report on Thursday slipped 0.7 percent. Last month, the tech-heavy Nasdaq fell as much as 19 percent from its all-time high in November as investors …