US investment groups are racing to capitalise on the reopening of Venezuela's oil sector, targeting underinvested oilfields and launching new investment vehicles after US President Donald Trump's January call for companies to invest $100 billion to help rebuild the country's energy industry, the Financial Times reported. Among the early movers is Miami-based Lionheart Capital, which has signed a letter of intent aimed at merging its publicly listed affiliate, Lionheart Holdings, with Keo Energy, a group with oil assets in Venezuela's Maracaibo Basin, according to London-based business daily the FT.