(Bloomberg Businessweek) -- When Christoffel and Jan Raphoen invented market-making in Amsterdam around the 1620s, their job was small in scope: Buy shares of Dutch East India Co., the world’s first publicly traded company, from people who wanted to sell, and sell to those who wanted to buy. The brothers were “the missing link,” according to historian and economist Lodewijk Petram, connecting buyers and sellers “who happened to be no...