A troubling 'self-fulfilling prophecy' may be forming a market bubble — here's how investors can avoid the potentially dangerous domino effect
- Passive investing has been the dominant strategy for years as active funds lagged.
- However, there’s a major risk building as everyone plows money into index funds.
- Here’s why market observers see a bubble forming — and what could finally pop it.
For years, investors who’ve done the least have performed the best.