** Shares of U.S. refiner Vertex Energy VTNR.O fall 7.1%
to $3.15 premarket
** Co says it amended its existing term loan agreement
** Amended term loan provides for an incremental $50 mln in
borrowings to VTNR, bringing total outstanding balance on the
term loan to $198 mln
** Additional financing expected to provide strategic
flexibility around potential transaction opportunities - VTNR
** VTNR stock fell ~45.3% in 2023
(Reporting by Vallari Srivastava)
((Srivastava.Vallari@thomsonreuters.com;))