Opinion: This one surprise move can help protect your 401(k) - MarketWatch
1. Large U.S. growth companies like NVDA continue to outperform their peers. 2. Historical bubbles caution against relying solely on major growth stocks. 3. Small-cap and value stocks may see a resurgence amidst market corrections. 4. Diversifying portfolios could mitigate risks from relying on large growth stocks. 5. Market concentration may lead to decreasing growth opportunities as valuations rise.