Will I get paid for overtime? how to use xantrin They are not alone among professional fund selectors in using momentum to improve returns for clients. Juan Vicente Casadevall of financial advisory firm Kessler & Casadevall says “there are a number of factors we have learned through the years that lead us to have some biases in our research process. One of them is momentum which seems at odds with a financial product that is aimed at investors for the medium and long term. But we have identified that placing a higher weight to the most recent performance of funds relative to their benchmarks can add value.”