Mark Spitznagel, a prominent investor known for his Black Swan fund, has warned that the U.S. stock market could decline by 80% when the current economic situation stabilizes. Spitznagel emphasized that the ongoing market downturn is not the beginning of this predicted crash, labeling the current conditions as a 'trap' for investors. His comments come amid a broader selloff in U.S. stocks, with some analysts suggesting that the situation may worsen before a potential buying opportunity arises. Spitznagel's remarks specifically reference the S&P 500 and the Nasdaq-100 indices, as well as the SPDR S&P 500 ETF (SPY) and the Invesco QQQ Trust (QQQ).