Sebastián Piñera, Chile’s billionaire former president, won the presidential election on Sunday, returning to the office he held from 2010-14 in the latest swing to the right in Latin America. The 68-year-old former airline magnate — whose anticipated victory propelled the local stock market to record highs this year after six years of stagnation — received 54.5 per cent of the vote, leaving his center-left rival Alejandro Guillier, a former television anchor, with 45.5 per cent, after 92 per cent of…