Aug 4 (Reuters) - Tabcorp Holdings Ltd TAH.AX -
* Target opex to revenue ratio for fy18 of approximately 22.5%
* FY18 capex expected to be approximately $150m, excluding capex in respect of TGS venue expansion
* FY18 D&A expected to be approximately $190m
* FY18 dividend target is 90% of npat before significant items, amortisation of the victorian wagering and betting licence and sun bets