Oct 18 (Reuters) - Steadfast Group Ltd SDF.AX :
* UPGRADES FY19 GUIDANCE TO UNDERLYING EBITA RANGING BETWEEN $190 MILLION AND $200 MILLION
* DECLARES A FULLY FRANKED TOTAL FY18 DIVIDEND OF 7.5 CENTS PER SHARE FOR YEAR
* SEES FY19 UNDERLYING NPAT RANGING BETWEEN $85 MILLION AND $90 MILLION