Below are charts which show recorded outbreaks of Ebola alongside stock market price movement.
There appears to be a correlation between Ebola outbreaks and both the Dow and S&P. Ebola outbreaks occur close to the beginning of a market crash in 2000, 2008 and a large correction (not a crash) in 2012. Previously an Ebola outbreak occurred at the end of a major market correction in 1976.
The Dotcom crash of 2000 to October 2002 was followed at its end by another outbreak of Ebola.
In 1994 / 1995 another outbreak of Ebola coincided with only a minor degree market correction (so the correlation is small).
Currently we are seeing the largest ever outbreak of Ebola. It’s an interesting correlation and if correct would support the bearish wave counts for S&P and Dow.