Andrew Edward Left is an activist short seller, author and editor of the online investment newsletter Citron Research, formerly StockLemon.com. Left is known for advising investors on short selling and has often appeared on various media outlets such as CNBC and Bloomberg to talk about his opinions on stocks. In 2016, Left was banned for five years by the Hong Kong Market Misconduct Tribunal for disclosing false or misleading information, and so inducing transactions under the Securities and Futures Ordinance.