Nvidia's plunge a ‘difficult lesson' for investors betting on single-stock ETFs

1. Nvidia's ETFs saw drastic declines, highlighting volatility risks. 2. GraniteShares 2x Long NVDA ETF dropped over 33%, marking a record loss. 3. Competitive pressure from Chinese AI lab DeepSeek raised investor concerns. 4. Nvidia experienced a $600 billion drop in market cap, a historic record. 5. Single-stock ETFs have grown popular, but pose significant risks for investors.