Short-seller Andrew Left defied conventional wisdom to take the stand and testify in his own defense at his securities fraud trial this week. On Wednesday, he faced hours of cross-examination by a prosecutor — and it turned testy at times. A federal judge had to direct Left to answer questions at least a half-dozen times, and also scolded the government's lawyer for editorializing as the closely watched case entered its final days. Left, the founder of the influential Citron Research, is

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