The remittance mystery

For decades, the U.S. has been the single biggest source of remittances worldwide. A remittance is a transfer of money, typically from an immigrant to their family in their country of origin. But we are in the middle of a big, loud and very public immigration crackdown on those who are here without legal status. And that crackdown is disrupting the global remittance market. 

People who have come to the U.S. from a handful of countries — especially some Central American countries — have been sending more money back to their countries of origin. And it’s a bit of a...