Looking to dazzle friends and family at the next summer barbecue? Well, drop this little fact on them: global interest rates are at their lowest in 5,000 years. Not only that, you can tell the acquaintance who brags about his gold bars in the bank vault that returns on commodities are the worst since 1933. Sounds crazy you may say, but that’s just the kind of history Bank of America Merrill Lynch rolled out in the third edition of “Longest Pictures” note. The first chart shows the lowest global interest rates going all the way back to 3,000 B.C. Michael...