Shares of oil refiner Delek US Holdings DK.N gain ~4% to $37.80
DK posts surprise profit for the fourth quarter, helped by stronger performance in its refining segment
Posts adjusted profit of 44 cents per share vs. analysts' average estimate of 76 cents loss per share - data compiled by LSEG
Co posts a fourth-quarter profit of $78.3 million, compared with last year's loss of $413.8 million
Co's refining segment posted an adjusted core profit of $314.1 million compared to a loss of $68.7 million a year ago
Including session's move, stock up 27.4% YTD