Switzerland’s UBS bank has been fined 50,000 Swiss francs ($55,000) over due diligence considerations in connection with funds from a former president of Yemen. The Swiss Finance Ministry on Thursday confirmed the size of the fine after it was initially reported by the country’s broadcaster SRF. UBS, a major investment bank and financial services company, has total assets of $1.7 trillion. The SRF report said UBS managed assets belonging to Ali Abdullah Saleh, who served from 1990 to 2012 as the first president of the unified Republic of Yemen. Despite well-known allegations of corruption agai…