The paper titled, “Discerning Information from Trade Data” by David Easley, Marcos Lopez de Prado, Maureen O’Hara, gives a Bayesian framework for trade classification. The most popular method for classifying a trade as buy/sell is via “tick test”. The authors introduced Bulk Volume Classification (BVC) and empirically test the performance of it vis-à-vis tick test. In this post, I will briefly summarize the paper :
**Introduction
**With the advent of HFT, the markets have changed completely.