| Abstract: | We analyze the effects of differences of opinion on the dynamicsof trading volume in stocks and options. We find that disagreementsabout the mean of the current- and next-period public informationlead to trading in stocks in the current period but have noeffect on options trading. Without options, we find that disagreementsabout the precision of all past and current public informationaffect trading in stocks in the current period. With options,only disagreements about the precisions of the next- and current-periodinformation affect stocks and options trading in the currentperiod. Our results suggest that options trading is concentratedaround information events that are likely to cause disagreementsamong investors, whereas trading in stocks may be diffusiveover many periods. |
