Japan’s 10-year yield BX:TMBMKJP-10Y hit 1.77% this week, up seven-tenths of a percentage point from last year. That’s pathetic by U.S. standards, but, for the first time since shoulder pads were fashionable, Japanese investors can make actual money at home. When you can get paid without leaving your house, the overseas shopping spree ends.This week, all three forces converged in the manner of a bad family reunion.Last June, I laid out why this had to end : Japan’s aging population needs those savings for r ...