Halloween selection Trick or treat？The answer to the stock market is, of course, treat! Research shows that Halloween is the best time of the year to enter the market to buy stocks, because with Halloween as the midpoint, the return of the stock market in the second half of the year is significantly higher than the return of the first half of the year。According to economists, in the six months after Halloween each year, the average annualized return of 65 stock markets around the world is a full three times higher than in the six months before Halloween, an effect also known as the mysterious "Halloween effect."。Why this magical Halloween effect？At present, economists in various countries can not say why。There is a saying that before Halloween, investors in the northern hemisphere began to take summer vacations, which had an impact on stock market activity, so yields were not high;。During these important holidays, Americans will spend desperately to boost the economy, and the stock market is likely to come out of a wave。