This paper reports on the results of an experiment in which MBA student participants select securities at random for the purpose of reproducing the familiar exponentially declining relationship between portfolio volatility and number of securities. We find that the overall set of participants...

Distorted prices misguide managerial incentives and resource allocation. Distorted prices may occur when firms' stock prices are near their 52-week highs because investors tend to perceive the stocks as relatively overvalued and are reluctant to bid prices higher even if new information warrants...

Firms can change their outstanding shares to manage their stock price levels. Those with lower stock prices tend to attract more speculative trading, which causes higher price volatility and may force their managers to excessively focus on short-term earnings at the expense of R&D and other...