ABSTRACT This study sought to analyze information asymmetry in the Brazilian stock market and its relation with the returns required from portfolios through the metrics volume-synchronized probability of informed trading. To do this. the study used actual data from the transactions of 142 stocks on the Brazilian Securities. Commodities and Futures Exchange (BM&FBOVESPA). https://www.parisnaturalfoodes.shop/product-category/bar-38-milk/