(Bloomberg) -- Bullish calls on US stocks will be challenged if benchmark Treasury yields hit 5%, a level that usually depresses price-to-earnings ratios, according to Lori Calvasina, head of US equity strategy at RBC Capital Markets LLC. Most Read from BloombergHormuz Oil Flows Creep Higher as More Supertankers ExitIran’s Kharg Island Oil Jetties Empty Again Yesterday, Satellite ShowsWhat Is The Thucydides Trap and Why Did Xi Raise It With Trump?Xi Tells US CEOs on Trump Visit That China Will O