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Sometimes even Wall Street's top analysts are wrong. Since Goldman Sachs downgraded Proofpoint Inc (NASDAQ: PFPT) in late March to a bearish rating, the stock has returned 60 percent. The Analyst Goldman Sachs' Gabriela Borges upgraded Proofpoint from Sell to Neutral with a price...

Shares of Proofpoint Inc (NASDAQ: PFPT) fell more than 4 percent on Thursday after short-selling research firm Muddy Waters pitched a short thesis at the Sohn investment conference. Muddy Waters argued Proofpoint's management was "misleading" investors and "mischaracterizing" the company's status...

During an interview with Benzinga, Zix (NASDAQ: ZIXI) CEO Rick Spurr discussed his company’s second quarter results. Shares of Zix are up more than 15 percent since reporting EPS of $0.04, versus the $0.03 estimate and revenue of $12.6 million versus the $12.45 million estimate on July 22...