On 23 October 2000, the U.S. SEC put Regulation Fair Disclosure into effect. It requires companies to disseminate releases of material information to all investors, not selectively. Proponents of Regulation FD argued that the flow of information would improve; critics of the regulation asserted that Regulation FD would increase volatility and reduce the quantity of information being released into the market, resulting in an increase in asymmetric information. We examined components of the bid–ask spread surrounding news releases and trading activity by retail versus institutional investors before and after the institution of Regulation FD. Our results indicate no significant increase in volatility after Regulation FD, and we found little or no increase in the adverse-selection component of bid–ask spreads. Overall, our results do not support critics of Regulation FD.