Investors abroad sold longer term Treasuries for three consecutive months, a sign of central bankers reducing their reliance on the U.S. as a financial buffer. In January, foreigners sold a net $13.3 billion of U.S. notes and bonds that had more than one year to maturity, the latest Treasury data show. It comes after $49.69 billion was sold in December, following sales of $34.41 billion in the month of U.S. elections, November. Global central banks represent a big chunk of foreign demand. Before the back-to-back net selling of the world’s safest debt, foreigners had kept buying for 15 straight months....