. In particular the relationship between speculation and price volatility on the one side, and the linkage between … excessive speculation and price volatility on the other side, is carefully examined with the scope to establish whether … volatility drives speculation or speculation drives price volatility, or whether there are no linkages between the two variables …

herding behavior and market risk. Moreover, speculators' orders depend on price trends, market misalignments and fundamental … news. Using a mix of analytical and numerical tools, we show that a herding-induced market entry wave may amplify excess … demand, triggering lasting volatility outbursts. Eventually, however, higher stock market risk reduces stock market …