These 2 ETF strategies can lower your risk during this period of stock-market uncertainty - MarketWatch

1. Investors should consider low-volatility strategies amid market uncertainty. 2. S&P 500 heavily influenced by large tech firms like Apple and Microsoft. 3. SPY ETF shows significant concentration, with top three holdings at 18.5%. 4. Lower-volatility investments historically yield better risk-adjusted returns. 5. Invesco's ETFs provide diversification away from cap-weighted S&P 500.