Stocks Trade Mostly Lower Friday to Finish Down on the Week, Conflict Continues in Ukraine, FOMC Minutes Released, ISM Services Show Growth in March, Elon Musk Becomes Twitter's Top Shareholder, Yield Curve Inversion Risk Continues, Analysts Have Most "buy" Ratings on S&P 500 Stocks Since at Least 2010, Google Begins Full-Scale Drone Delivery to Residential Homes in Dallas, HP Stock Rises 14.8% after Warren Buffett Announces $4.2B Stake, and Peter Thiel Calls Warren Buffett a Sociopath Grandpa From Omaha and Bitcoin's Enemy No. 1