European stocks may open lower on Wednesday as investors fret about a weakening U.S. and highly elevated valuations for many artificial intelligence companies. As the U.S. government shutdown beats record set during President Trump's first term, traders await payroll processor ADP's report on private sector employment as well a report on U.S. service sector activity later in the day for more insights into the economic and rate outlook. After the closing bell, shares of Advanced Micro Devices fell nearly 4 ...