60 Years Of Raw Data Say S&P 500 Is 8 Times More Likely To Drop 5% In A Month Than To Rise 10%

Based on Trefis analysis of many decades of data, there is overall 8% chance that S&P 500 will drop by -5% or more over a month, while there is ONLY about 1% chance that it will rise by 10% or more. The Trefis S&P 500 engine calculates these chances based on your inputs and 60 years of data.
Source: Forbes Markets