The S&P 500 has been buoyant mainly because of A.I. fever, while bonds are having another mediocre year. But as an investor, our columnist is staying the course. Standard & Poor’s 500-Stock Index, Stocks and Bonds, Interest Rates, Presidential Election of 2024, Mutual Funds, Inflation (Economics), Content Type: Service, Personal Finances, Artificial Intelligence, Federal Reserve System The S&P 500 has been buoyant mainly because of A.I. fever, while bonds are having another mediocre year. But as an investor, our columnist is staying the course. NYT > Business