Throughout human history, economic bubbles have formed and burst. As a bubble grows, microeconomic behavior ceases to be constrained by realistic predictions. This contradicts the basic assumption of economics that agents have rational expectations. To examine the neural basis of behavior during bubbles, we performed functional magnetic resonance imaging while participants traded shares in a vi...

Stock-based compensation puts managers in the position of having, at some point, to sell stock. The prevalence of stock-based compensation in the 1990s allegedly created incentives for managers to hype their companies’ stock price by manipulating earnings before selling stock. Consistent with this conjecture, we find that managers tended to inflate earnings prior to selling stock. Moreover, the...

economic stabilization is one of the main government objectives in the economy. one of the most destructive and devastating factors that could damage financial markets, are price bubble formations. thus, bubble creation in stock markets can be considered as a result of investor behaviors, because the market prices mainly reflect investor expectations from firm’s future perspectives. the aim of ...

Following our previous investigation of the USA Standard and Poor index anti-bubble that started in August 2000, we analyze thirty eight world stock market indices and identify 21 anti-bubble. An “anti-bubble” is defined as a self-fulfilling decreasing price created by positive price-to-price feedbacks feeding overall pessimism and negative market sentiment further strengthened by inter-persona...

When investors have differences of opinion about the payoffs of a stock, Harrison and Kreps (1978) demonstrate the existence of a speculative bubble in the stock price, that is, the stock price can exceed the valuation of the most optimistic investor. A crucial condition that supports this result in their model is that investors are not allowed to short sell the stock. This paper demonstrates t...

In this paper, we quantitatively investigate the properties of a statistical ensemble of stock prices. We focus attention on the relative price defined as X(t) = S(t)/S(0), where S(0), is the stock price for an onset time of the bubble. We selected approximately 3200 stocks traded on the Japanese Stock Exchange, and formed a statistical ensemble of daily relative prices for each trading day in ...

herd behavior by investors in capital markets is a behavioral bias that can cause to undesirable effects such as bubble, crash and high fluctuation in stock price. this anomalies can disturb the equilibrium relations in stock market and lead to market inefficiency. herd behavior is a condition that investors with rational or in rational reasons ignore private information and imitate from others...