Does it matter to market quality if broker identities are revealed after a trade and only to the two traders involved? We find that implementing full anonymity dramatically improves liquidity and reduces trader execution costs. To explain this, we compare theories based on asymmetric information...

We study the impact on market liquidity of the introduction of a penalty for high order-to-trade ratios (OTRs), implemented by the Italian Stock Exchange to curtail high-frequency quote submission. We find that the fee is associated with a collapse in the quoted depth of the stocks that make up...

[eng] Does market volatility increase ? . The French stock exchange has known a deep fall in prices for 3 years with great uncertainties on economic activity and firms' finances. So, this article deals with the size of market' s turbulences, their origins and the measures to take. A proper...