Featured Gas OilNNPC records N6.33b trade surplus in May -ReportBy Abisola THOMPSONJuly 21, 2019July 21, 2019 by By Abisola THOMPSONJuly 21, 2019July 21, 20190617 The Nigerian National Petroleum Corporation (NNPC) said it recorded a trade surplus of N6.33 billon for the month of May, 13 per cent higher than