Why is the stock market down today? S&P 500, Dow Jones, Nasdaq fall over 1 per cent. List of top gaining, losing stocks

Market Overview - Technology stocks are significantly impacting the market, with Nvidia down 2.4%, Microsoft down 1.9%, and Amazon down 2.6% [1][11] - The S&P 500 dropped 1%, the Dow Jones Industrial Average fell 449 points (1%), and the Nasdaq composite fell 1.6% [11] Corporate Earnings - Corporate earnings and forecasts are under scrutiny, providing insights into the economy amidst limited information due to the government shutdown [2][7] - DoorDash experienced a sharp decline of 15.1% after announcing increased spending on product development [3][11] - Datadog's stock surged 21.1% following earnings that exceeded analysts' expectations, while Rockwell Automation rose 4.8% for similar reasons [3][11] Economic Context - The ongoing U.S. government shutdown is affecting various sectors, including airlines, which are facing staffing issues leading to a 10% reduction in air traffic across 40 high-volume markets [8][12] - Major indexes have had a record-setting year, raising concerns about potential overvaluation, particularly among large technology companies [6][11] Treasury Yields - Treasury yields have decreased, with the 10-year Treasury yield falling to 4.09% from 4.16% and the two-year Treasury yield dropping to 3.56% from 3.63% [9][12] Summary of Key Companies - American Airlines fell 2.4%, Delta Air Lines dropped 1.8%, and United Airlines decreased by 2.7% due to the impact of the government shutdown [8][12]