The NASDAQ falling again, is now down two in a row, a close repeated 369 times in this century. Moreover, on the following day, this index declined on the following days as often as it moved higher. At the same time, both the DJIA and the S&P500 went positive after falling the day before.
Lower prices on the following day occurred more often in a ratio of 21:14.
Given the presidential election this year, we take a look at price changes between Labor Day and election day. Prices declined by small fractions in 2000, 2004, and 2008. The S&P500 lost -.03 percent in the 252 trading days during the 2000 election; it fell -.04 percent in 2004, but lost -.16 percent in the 2008 contest.
DJIA -.58 percent
NASDAQ -.09 percent
S&P500 -.27 percent