Healthcare insurer stocks, like UnitedHealth (UNH), Centene (CNC), and Oscar Health (OSCR), tumble as policy changes threaten the US government's Medicaid spending. Apple (AAPL) stock was upgraded to Hold from Underperform by Jefferies, highlighting potential upside for the June quarter. To watch more expert insights and analysis on the latest market action, check out more Market Domination Overtime here...

Another day of gains from big tech stocks lifted the S&P 500 and Nasdaq composite to fresh records on Wednesday. Technology shares in the S&P 500 rose more than 1%, buoyed by climbs in Apple Nvidia and Tesla —three stocks that number among the so-called Magnificent Seven that have helped power major indexes to new records in recent years. The tech-heavy Nasdaq added 0.9% to settle at its third record of the year, while the Dow Jones Industrial Average fell around 11 points, or less than 0.1%, to 44484.42...

Through its CPU architecture licensing, Arm has broad exposure to AI growth. The stock seemed to gain on Apple's WWDC conference. Shares of Arm Holdings (NASDAQ: ARM) shot up last month on a broader bullish trend in the semiconductor industry that lifted peers like Nvidia and AMD as concerns around tariffs and a potential recession simmered down, and the risk-on artificial intelligence (AI) trade returned...

The S&P 500 and Nasdaq closed higher Wednesday as tech stocks rose and the U.S. and Vietnam reached a trade deal...

Tesla shares rise even as the electric-vehicle company posts worst quarterly deliveries decline in its history...

Private-sector jobs data prepares the ground for the all-important monthly US jobs report on Friday...

The U.S. stock market continued to recover from the doldrums of earlier in the year, pushing itself to new heights...