US STOCKS — Wall St mixed as benchmark Treasury yields reach 5%, oil takes a pause
(Updates to midafternoon trading, adds analyst comments) Indexes: Dow down 0.34%, S&P 500 down 0.12%, Nasdaq unchanged Buffett steps down as Berkshire chair Xenon Pharmaceuticals slides after trial setback Crude prices pause at over $100/barrel as China asks Iran to curb Houthi attacks By Stephen Culp and Niket Nishant