This paper studies the effects of a recent tick size reduction in the U.S. Treasury securities market. We find significantly narrower bid-ask spreads, increased trading activity, improveddepth within one old tick despite lower overall market depth, and improved price efficiency.Moreover, slow...

This paper studies the workup protocol, a unique trading feature in the U.S. Treasury securities market that resembles a mechanism for discovering dark liquidity. We quantify its role in the price formation process in a model of the dynamics of price and segmented order flow induced by the...

We study the workup protocol, an important size discovery mechanism in the U.S. Treasury securities market. We find that shocks in workup order flow explain 6-8 percent of the variation of returns on benchmark notes and, across maturities, contribute 10 percent to the variation of the yield...