Everyone Is a Momentum Investor Now

Overview

A conversational episode on what passive flows have done to index concentration and whether that changes the risk of holding the index. The hosts work through the arithmetic — how much of the move is mechanical, how much is earnings — and land on the view that concentration is a return-sequencing problem rather than a bubble claim. They also cover what an advisor actually tells a client about it.

Key takeaways

• Index concentration is high by history but the earnings share has moved with it — that weakens the bubble framing.

• Passive flows amplify existing weights; they do not choose them.

• The practical risk is sequence-of-returns for anyone drawing down, not permanent impairment.

• Rebalancing discipline matters more in a concentrated index, not less.

Companies & tickers

• Vanguard
• BLK

Topics

• Index funds
• Concentration
• Flows
• Asset allocation