SINGAPORE( Reuters)-Singapore's high court has convicted two people over what authorities consider to be the largest market manipulation case in the city-state, a joint statement by the Singapore police and Monetary Authority of Singapore said on Thursday.... For almost a decade, Singapore authorities have been investigating suspected trading irregularities tied to a so-called penny-stock crash in late 2013 that wiped out around S$ 8 billion($ 5.78 billion) from the value of three companies wit