Wondering if anyone would be willing to suggest a set of fundamental factors that might be germane to the Q contest/fund? Looking at https://www.quantopian.com/help/fundamentals, there is a dizzying number of fields, and I have to think many of them just don't matter.
An example is free cash flow yield, which one site describes as "Free Cash Flow Yield: The Best Fundamental Indicator." Are there others that one could test that are well-known in the investment world (and not one of the Q risk model factors)? I'm not looking for any "secret sauce" here--just some ideas of what is commonly known/believed in the investment world.