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The Importance of Sharp Ratios in Factor Investing
In a long-term near-efficient markets, you need sharp ratios not too high. So 0.5 is perfect, especially if you can combine them. I hardly find people doubting the equity premium because in the long run it's 0.3 or 0.4. That's capturing factor premiums real life really requires character and persistence rather than just more IQ and better back tests.