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UC Davis Study Finds Insiders Earned $2 Billion Trading Faltering Companies’ Stock

Inside traders at public U.S. companies made nearly $2 billion from 2000 to 2007, according to the study led by Paul Griffin, a professor in UCD’s Graduate School of Management. The study tracked insider stock transactions that occurred during or near 1,718 first-time disclosures of debt covenant violations by companies. Statistical analysis showed that insiders sold stock one to two months ahead of market declines preceding a disclosure, and bought shares one to two months ahead of market recovery.