The U.S. Export-Import Bank on Wednesday approved its fourth supply chain finance transaction and will guarantee up to 90 percent of $450 million in liquidity offered by a JPMorgan Chase loan to suppliers of Caterpillar. In specific, the bank’s guarantee will support small business suppliers by improving their liquidity, thereby allowing them to fulfill new orders. The Supply Chain Finance guarantee allows JPMorgan to increase its purchases of accounts receivable owne...