Oil prices extended gains for a fourth session on Thursday to reach the highest levels in more than 13 months, underpinned by an assurance that U.S. interest rates will stay low, and a sharp drop in U.S. crude output last week due to the storm in Texas. FILE PHOTO: The Bryan Mound Strategic Petroleum Reserve, an oil storage facility, is seen in this aerial photograph over Freeport, Texas, U.S., April 27, 2020. REUTERS/Adrees Latif Brent crude futures for April gained 33 cents, 0.49%, to $67.37 a barrel by 0925 GMT, while U.S. West Texas Intermediate crude for April was at $63.45 a barrel, up 23 cents, 0.36%. Both contracts hit their highest since Jan. 8, 2020, earlier in the session with Brent at $67.70 and WTI at $63.79. The April Brent contract expires on Friday. An assurance from the U.S. Federal Reserve that interest rates would […]