Core Viewpoint - Stocks were falling on Friday following President Donald Trump's nomination of Kevin Warsh as the next chair of the Federal Reserve and the release of U.S. producer price inflation data for December, which was higher than expected [1]. Group 1: Market Movements - Major stocks mentioned include Apple, Sandisk, SoFi, Verizon, Amex, Western Digital, KLA Corp., and Exxon, indicating a broad market impact [1]. - The market reaction was influenced by macroeconomic factors, particularly the Federal Reserve chair nomination and inflation data [1].