There are several timing theories you can research that correspond to positive statistics (historically) when applied to the markets. However, there are only a handful of specific ones we use at Edvesting.com
Here are a few:
Seasonality - The last quarter of the year (Oct-Dec) has historically produced a positive gain over 80% of the time each year for over the past 50 years. You can find this research anywhere online and sift through the charts to zero in on the exact details. However, when you have these odds stacked in your corner and only trade LONG positions during this time frame, your odds are enhanced dramatically. This logic has many supporting factors. Some of which include the start of the fiscal year for many businesses (1 0ctober) when their accounting allows for reallocating assets and investments. While other factors often include the time of the year most consumers spend big bucks (holiday season/Christmas time).
...here is one time frame of the year that is statistically proven where the markets are typically flat at best
The best time of the year for the Energy sectors:
The worst time to be an Oil investor (or best to consider shorting Oil):
Other timing factors are simply based on historical stats that have proven to be "Good days" for the markets like this study: