Every day-trader dollar is worth five in a new theory on stocks

Day traders claiming bragging rights for this year’s $9 trillion U.S. equity rebound can find some supporting evidence in the latest research. Even as retail trading has grown to represent 20% of daily volume, Wall Street has struggled to figure out how much this modest-sized contingent actually influences prices. After …

Read moreEvery day-trader dollar is worth five in a new theory on stocks