The securities fraud trial of Andrew Left, founder of Citron Research, has concluded its arguments, with the jury set to deliberate on Friday. Prosecutors allege that Left manipulated the market, profiting over $20 million through deceptive practices. Assistant US Attorney Matthew Reilly described Left as duplicitous, claiming he misled retail investors while trading based on his own reports. The prosecution presented evidence, including Left's own messages, suggesting he aimed to manipulate stock prices. Conversely, Left's defense argued that the government was criminalizing normal trading behavior, emphasizing that they cherry-picked only 19 tweets from a vast amount of trading data. Defense attorney Eric Rosen pointed out that many of Left's trades occurred without any accompanying tweets, asserting that the government failed to prove any false statements made by Left. The jury's decision will determine whether Left is seen as a clever trader or a master manipulator.