In the 22,923 trading days from October 1, 1928 through January 6, 2020, stocks rose 52.26% of the days and declined 47.35%.

Forbes contributors publish independent expert analyses and insights. Mike Patton covers the financial markets, economy, and national debt. The Affordable Health Care Act, a.k.a., Obamacare, was ...

Mike Patton covers the financial markets, economy, and national debt. Follow ... The next chart shows the percentage change in the Dow Jones Industrial Average in each year from 1977 through 2019.