TRADING UP

Topps, long known for its sports trading cards, plans to let fans start trading shares of the company. The New York-based company will go public this year by tying up with a special purposes acquisition company. It will merge with Mudrick Capital Acquisition Corp., which will make a $250 million investment. The company has already expanded beyond traditional sports cards into other subject matter, including professional wrestling and film, while also moving into digital sales and apps. Topps was bought in 2007 by former Disney CEO Michael Eisner through his firm, The Tornante Co. Eisner will remain chairman of Topps’ board.