Section I. Research Question Main research question: How does CEO overconfidence affect firms’ M&A performance? Under the traditional corporate finance studies, we usually assume managers and investors to be rational. However, recent research in behavioral corporate finance proposed the effect of managerial traits on corporate financial decisions and performances. For instance, overconfident managers tend to overestimate the returns and underestimate the risk, thus, the managerial hubris will lead
driven interest rates. New financial instruments were established and a competitive bond market was created. Banks started to take increasingly excessive risks that were partly funded by 186 trillion Yen borrowed from various capital markets. The overconfidence also resulted in speculation of domestic stock and real estate, pushing up the prices of these assets. From 1985 to 1989, Japan’s Nikkei stock index tripled to 39,000 and accounted for more than one third of the world’s stock market capitalization