After a 20-month long Treasury banquet, U.S. banks swung from acquiring Treasurys toward making loans in March and April. That should mean better interest margins and higher earnings. Those two months were the first to see declines in bank holdings of debt issued or backed by the U.S. Treasury since September 2013. By the third week of April, these portfolios were 1% smaller than at the year’s start. Loans are on the menu now. The rate of seasonally adjusted loan growth at the 25 largest U.S. banks is at the highest level in nearly six years. Apart from home equity loans, every category of bank credit tracked by the Fed has been expanding.