equilibrium, investors acquire less information and informational efficiency declines. As a result, return volatility increases …

plays an important role in explaining the idiosyncratic volatility (IVOL) puzzle, the correlation among IVOL, market beta …

This paper reviews the more recent literature addressing different facets of speculation in commodity markets …, including the role of speculators and the impact that financialization in recent years. While speculation and financialization …

We investigate the ways in which the net buying pressure of options and the volatility of the underlying asset affect … the trading demand for speculation and hedging in TAIEX options. We place particular focus on an examination of whether … any changes were discernible in the volatility effects after the 2007 subprime mortgage crisis, and find that volatility …