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Neu project ko co' equity component thi cost of capital cua no' chi co' cost of debt thoi, ie. "capital investor" cho project na`y chi co' debtholders, expected rate of return cua debtholder chi'nh la` cost of debt roi con gi. Cost of debt cua cty se kha'c voi cost of debt cua project ma`. Neu project co' do risk cao, ban nghi debt market se expect la` charge no' voi cost bang voi cost of debt hay muc WACC cua cty sao?
Ca'i cthuc ma to noi la`, sorry, dung cho capex investment, ie co' systematic risk ko kha'c voi cty, cho nen ti'nh truc tiep tu WACC cty. Truong hop systematic risk kha'c voi cua cty, vi du nhu nhu di acquire cty X hay division X cua cty kha'c chang han, thi cugn ti'nh tuong tu nhu vay thoi, hoac la ti'nh unleverage cost of equity cua X roi sau do' releverage lai theo new capital structure cua X roi apply vao WACC, hoac la` ti`m ca'c cty co' business risk tuong tu tinh average cua ca'c unleverage cost of equity, sau do' dung new capital structure cua X de releverage cost of equity roi wang vo WACC fomula.
Ca'i cthuc ma to noi la`, sorry, dung cho capex investment, ie co' systematic risk ko kha'c voi cty, cho nen ti'nh truc tiep tu WACC cty. Truong hop systematic risk kha'c voi cua cty, vi du nhu nhu di acquire cty X hay division X cua cty kha'c chang han, thi cugn ti'nh tuong tu nhu vay thoi, hoac la ti'nh unleverage cost of equity cua X roi sau do' releverage lai theo new capital structure cua X roi apply vao WACC, hoac la` ti`m ca'c cty co' business risk tuong tu tinh average cua ca'c unleverage cost of equity, sau do' dung new capital structure cua X de releverage cost of equity roi wang vo WACC fomula.

