美股周二收盘点评：投资人谨慎选择，科技股领跌

Group 1 - The core viewpoint is that Federal Reserve Vice Chair Bowman is considering succeeding Chairman Powell after his term ends next year and supports at least three interest rate cuts this year in response to President Trump's call to lower borrowing costs [1] - Interest rate futures indicate that the Federal Reserve is expected to cut rates twice this year, each by 25 basis points, with the first cut anticipated in September [1] - A key event this week is the Federal Reserve's annual symposium in Jackson Hole, Wyoming, from August 21 to 23, where Chairman Powell's remarks will be closely analyzed for insights on the economic and monetary policy outlook [1] Group 2 - Bond yields have decreased, while the dollar has seen a slight increase [1]