Fuzzy Math in Quant ETFs? A $1 Trillion Boom Draws Naysayers
- Small tweaks in strategy can make a difference in performance
- The traditional concept of book value appears to be obsolete
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Today’s rules-based investing models were supposed to take the guesswork out of Ben Graham’s age-old principle of using “established standards of value” in deciding what to own.
In practice, some argue, they’ve made things more confusing.