does the halloween investing strategy outperform buy and hold 
historical stock returns suggest that using the halloween strategy has provided investors with stronger capital gains than other months of the year selling in may is also considered an effective strategy providing gains more than 80 of the time over five years and 90 of the time over 10 years the bottom linethe halloween strategy suggests that investors should buy stocks in november and hold them until april when it s time to sell them off although research shows that there is some truth to the theory investors should remember that it s just that a theory whether you call it the halloween strategy halloween effect or halloween indicator do your due diligence and research before adopting any investment strategy 