A computer can trounce a human chess master and solve complex mathematical calculations in seconds. Can it do a better job investing your money than a flesh-and-blood portfolio manager? Investors willing to test that question can do so with a couple of exchange-traded funds, or ETFs, that leave the investment decisions to a computer's so-called artificial intelligence, or AI. ETF Managers Group and Ocean Capital Advisors launched an AI-powered fund last month dubbed the Rogers AI Global Macro ETF (BIKR) that invests primarily in single-country ETFs. The fund's AI sifts through millions of data points from countries around the globe and uses what it learns to determine how best to allocate the fund's holdings.