> So the age-old wisdom of "just buy an index fund" may have run its course, and you will actually have to pay attention to valuations instead of just blindly buying the market going forward.
The efficient-market hypothesis would probably disagree. If "paying attention to valuations" ever consistently produces greater returns, then index funds will start weighting their holdings in such a way to capture that value. If it produces greater returns, but not consistently, then we're back to gambling and things like technical analysis and trying to time the market.
The efficient-market hypothesis would probably disagree. If "paying attention to valuations" ever consistently produces greater returns, then index funds will start weighting their holdings in such a way to capture that value. If it produces greater returns, but not consistently, then we're back to gambling and things like technical analysis and trying to time the market.