TYPE “BOBBY AXELROD” into Google and the first recommendation that pops up is “Bobby Axelrod hoodie.” So, to satisfy your curiosity: Mr. Axelrod, the cool-as-an-ice-cube-in-Alaska protagonist of Showtime’s series “Billions,” wears Loro Piana zip-ups. They’re cashmere and just in case you’re really interested in dressing like the man who makes the billions on “Billions,” each one costs $2,295. For a glorified sweatshirt, they’re a needlessly expensive indulgence, which makes them perfect for a show that is the embodiment of what wealth looks like today.

Now...