BRIEF-Oslo Bourse says Frontline and Seadrill go out of obx index , Golden Ocean and Nordic Nanovector in

* The OBX index consists of the 25 most traded shares at Oslo Bourse Source text for Eikon: file:///C:/Users/u8018554/Downloads/OSLO%20BORS%20-%20INDEX%20CO NSTITUENTS%20OBX%20and%20OBOSX%202H%202017.pdf (Reporting By Ole Petter Skonnord)