Hong Kong developer Wharf (Holdings) is increasingly relying on Hong Kong’s luxury-home market to offset weakness in mainland China, while paring investments and building up cash as it navigates an uncertain outlook. Revenue from Wharf’s Hong Kong development properties nearly tripled to HK$1.35 billion (US$172 million) from HK$475 million in the first half, with operating profit rising more than fivefold to HK$166 million, according to its interim results announced on Tuesday. That helped...