Investors can buy shares in the Atlanta Braves (BATRK) or Manchester United (MANU) and soon they will be able to do the same with the New York Knicks and New York Rangers after Madison Square Garden (MSG) splits off its entertainment businesses from its sports operations, which it may do sometime this year, Nicholas Jasinski writes in this week’s edition of Barron’s. While each is a real business, with revenues and profits, their stocks are driven more by private transaction valuations than they are by fundamentals, the author contended, adding that while the teams are unusual investments, at least they are investments.