Check out the companies making the biggest moves in midday trading: Fannie Mae , Freddie Mac — Shares of the mortgage financing companies rallied after Pershing Square Capital Management’s Bill Ackman said in an X post late Sunday that the stocks are “stupidly cheap.” The billionaire investor suggested shares could rise 10-fold. Shares of Federal National Mortgage Association (Fannie Mae) and Federal Home Loan Mortgage (Freddie Mac) rose more than 30% each in trading Monday. Boston Scientific — The medical device company’s stock tumbled more than 9% after Raymond James downgraded it to outperform from strong buy as it cut estimates below Wall Street’s consensus. The firm said trends are weakening in its key growth areas. Palo Alto Networks — Shares of the cybersecurity developer jumped more than 7% after CEO Nikesh Arora disclosed Friday that he purchased $10 million worth of shares on the open market. United Therapeutics — The pharmaceutical company’s stock rose nearly 13%, hitting a 52-week high, after it reported upbeat Phase 3 clinical trial results for Tyvaso, its main product. United Therapeutics said it would seek a priority review from the Food and Drug Administration to expand the drug’s label to include idiopathic pulmonary fibrosis, a progressive lung disease. Tyvaso already treats two forms of high blood pressure in the lungs. Alternative asset managers — The Department of Labor proposed a r …
