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REDDIT

Investing in the Five Factor Portfolio

B
Feb 20, 2026 · 12:28

Hey everyone!

For the last few months I have been trying to find ways to diversify out of the US market and have a more global portfolio. I came across Ben Felix video on the Fama-French five factor model and read his paper as well as the original paper. I’m am having a hard time nailing down exactly what the allocation of the model portfolio. I came across a YouTuber OptimizedPortfolio and he sets it at:

42% - US Total Market

24% - Developed Markets

12% - Emerging Markets

14% - US Small Cap Value

12% - International Developed Small Cap Value

I am confused how he derived this and am sure it’s not exactly matching to the model portfolios in the paper. Does anyone have some suggestions on how to model the portfolio for US investors?