In the past 20 years, 1987 has the worst Oct with NASDAQ down -27.23% and DOW down -23.21%, followed by 2000, 1997 and 1990. So far this year, Oct is ranked as the fifth worst october since 1986. Currently, we are down -4.08% NASDAQ for the month. See what is the final rankings in the end of the month. Looks like ugly and getting worse.