May officially marks the beginning of the “Worst Six Months” for the DJIA and S&P. To wit: “Sell in May and go away.” Our “Best Six Months Switching Strategy,” created in 1986, proves that there is merit to this old trader’s tale. A hypothetical $10,000 investment in the DJIA compounded to a gain of $1,180,836 for November-April in 73 years compared to just $3,323 for May-October (STA 2024, page 54). The same hypothetical $10,000 investment in the S&P 500 compounded to $977,443 for November-April in 73 years compared to a gain of just $13,335 for May-October

May has been a tricky month over the years, a well-deserved reputation following the May 6, 2010 “flash crash”. It used to be part of what we once called the “May/June disaster area.” From 1965 to 1984 the S&P 500 was down during May fifteen out of twenty times. Then from 1985 through 1997 May was the best month, gaining ground every single year (13 straight gains) on the S&P, up 3.3% on average with the DJIA falling once and NASDAQ suffering two losses.