Who Neglects Risk? Investor Experience and the Credit Boom. Samuel G. Hanson, Adi Sunderam, April 2015, Paper. “Many argue that overoptimistic thinking on the part of lenders helps fuel credit booms. We use new micro-data on mutual funds’ holdings of securitizations to examine which investors are susceptible to such boom-time thinking. We show that firsthand experience plays a key role in shaping investors beliefs. During the 2003 to 2007 mortgage boom, inexperienced fund managers loaded up on securitizations linked to nonprime mortgages, accumulating twice the holdings of more seasoned managers by 2007…” Link