The S&P 500 and Nasdaq Composite dropped in the first trading session of 2024, weighed by a decline in Apple shares following a broker downgrade and a brief climb in Treasury yields as investors tempered interest-rate cut expectations. The lackluster start follows a year where Wall Street’s three major indexes notched double-digit gains on the back of optimism around artificial intelligence and stabilizing inflation. The S&P 500 ended last week within 1% of a record closing high reached in early 2022.