Famed short-seller Carson Block unpacks how he picks his bearish targets

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• Carson Block's Muddy Waters Research unveiled a new short bet last week.
• The famed short seller described SoFi as a "financial engineering treadmill."
• Block spoke with Business Insider about how he identifies his short targets.

Carson Block has been taking aim at big companies with his scathing short reports for years.

The short-seller who founded Muddy Waters Research rose to fame on Wall Street in 2011 after...