Trading houses that resell Venezuelan crude oil have not yet found workarounds since the United States announced sanctions to cut off socialist President Nicolas Maduro’s revenue, according to shipping data and sources.  Merchants, trading partners and Venezuela’s state-run PDVSA were expecting oil swaps and so-called triangulation of sales to be the easiest ways to continue shipping, as has happened when sanctions were imposed on other nations, such as Iran and Russia. But the U.S. measures – tougher and deeper than past sanctions – have for now blocked a large portion of trading in Venezuelan oil worldwide as end-users are reluctant to take cargoes, leaving barrels stranded in the Atlantic basin, according to data from Refinitiv Eikon. […]