How to Evaluate Factor Funds

Rick Steves: How does one evaluate factor funds? He says a multi-factor approach works best because you're only going to take a small portion of your portfolio and do this with it. Value is in the eyes of the behold, he says; there are an infinite number of different value investing strategies that can be used. steves: I don't recommend any more than 25% of your equity going into this type of fund.