Adobe’s CFO just made a rare purchase of stock. It sends an upbeat signal.

Adobe shares have lost a quarter of their value in the past six months. Adobe Inc.’s chief financial officer recently purchased shares on the open market for only the second time in his tenure at the company — a move that suggests he views Adobe’s recent stock pressure as excessive. CFO Dan Durn’s purchase last week of $508,000 worth of Adobe shares ADBE came after the company’s latest earnings got panned by investors. Adobe shares hit a nearly two-year low following that report, but his latest purchase aligns with his...