Stock market today: Dow, S&P 500, Nasdaq fall as Wall Street digests Warsh as Trump's Fed pick

Market Overview - US stocks experienced a decline on Friday, with the S&P 500 falling by 0.2% and the Nasdaq Composite decreasing by 0.3%, indicating a continued downturn for tech stocks [1][2] - The dollar strengthened due to the prospect of Kevin Warsh being nominated as the next chair of the Federal Reserve, while gold and silver prices dropped as a result of the dollar's rise [3] Federal Reserve Leadership - President Trump announced his nomination of Kevin Warsh for the Federal Reserve chair position, which has led to market speculation regarding interest rate policies [2] - Warsh has a history of hawkish views on interest rates but has recently shown support for rate cuts, aligning with Trump's campaign for lower rates [2] Company Earnings - Apple's shares fell by 2% despite reporting quarterly profits that exceeded estimates, driven by record iPhone sales; however, CEO Tim Cook cautioned that a global memory shortage may impact future profit margins [5] - Sandisk's shares surged over 20% following positive forward guidance, indicating strong future performance expectations [6] Trade Policies - President Trump threatened to impose a 50% tariff on Canadian aircraft imports and decertify new jets from Bombardier, citing unfair trade practices [4] - New tariffs on countries supplying oil to Cuba were also promised, indicating a potential shift in trade relations with Mexico [4] Weekly Performance - Despite recent volatility, major indexes are mostly higher for the week, with the S&P 500 and Nasdaq Composite showing gains, while the Dow is slightly down [7]