On Friday I telephoned my colleague who edits this page and said that I was thinking of writing this column about gold and currencies. I outlined my argument, that the dollar is still too high, that the US external deficit is not sustainable, that the European and Japanese economies are suffering from low growth, that the euro and the yen are attractive only compared to the dollar. I added that gold was making new highs, and that the preference for gold showed the lack of confidence in the main currencies. On Saturday morning I opened the Business section and found...