'Absolute tsunami' of ETFs to hit market, and investors need to prepare now, says fund expert
1. Massive ETF launches expected due to SEC regulatory changes. 2. Current ETFs could double from 4,000 to 7,000 soon. 3. Vanguard's S&P 500 ETF sees record annual inflows. 4. Investors face challenges with increased variety and complexity of ETFs. 5. History shows active managers often struggle to beat the market.