Slight to moderate favorites tend to get bet up from the slight favorite range and as the odds increase will, over many, many matches, underperform when it comes to expected win percentage based on those bet up odds.
The market gets pushed out of range.
That means that the slight to moderate underdogs, the opposite of those plays will actually overperform when compared to the odds offered. Over the last ten years, you could virtually blindly bet all underdogs from about a pickem to about +185 across UFC, Bellator, PFL and the old WSOF and profit.
This is what our research shows and this is the general area where value is created despite the vigorish charged.