In this paper we examine the quantitative effects of margin regulation on volatility in asset markets. We consider a … of collateral constraints leads to strong excess volatility. Thus, a regulation of margin requirements may have … stabilizing effects. However, in line with the empirical evidence on margin regulation in U.S. stock markets, we show that changes …

markets, to measure changes in the information contribution of markets before and after implementation of Regulation Fair … individual markets. This paper uses this information share as a metric to test the effect of a particular regulation. Employing … Regulation Fair Disclosure has achieved its intended goal of greater informational parity and market integration. Results show …

's Regulation NMS. The theory behind Regulation NMS is that a system of dispersed markets operating pursuant to SEC … that Regulation NMS has failed in that quest. It has produced fragmented markets and created questionable incentives for … customers' interests, and forces the SEC to act as a price regulator.The paper contends that the SEC should replace Regulation …

European and U.S. markets since the implementation of Markets in Financial Instruments Directive and Regulation National …