You may have heard the classic investment advice to keep 60% of your savings in stocks and 40% in bonds. But what about the 25/25/25/25 plan, also called the “permanent portfolio”? Recent research shows that this crude allocation beats most of the more carefully calibrated ones.

And you might think that Donald Trump has destroyed American financial diplomacy. In fact, he has remade it in his image. It is now nakedly self-interested. Money flows to ideological allies, to leaders who control something he covets and to countries he hopes to lure away from China. In the long run, spending on these goals may outpace what was once allocated to poverty alleviation.