You are a portfolio manager. One day your hardworking analyst sends you an urgent memo. She has discovered a pattern in historical stock return data. She claims that on leap year Thursdays, stocks whose ticker symbols start with the letter $$U$$ tend to earn higher returns than other stocks. The analyst remarks that the return difference associated with this leap$-$year$/$Thursday$/$U$$ anomaly is $$statistically and economically significant.$$ How do you respond?