South Korea's KOSPI Is Trading Like a Meme Stock, and the S&P 500 or Nasdaq Composite May Be Next

South Korea's KOSPI index has experienced extreme volatility similar to meme stocks, driven by heavy concentration in two companies (Samsung and SK Hynix) and retail investors' use of leveraged ETFs. The article warns that the U.S. stock market faces similar risks, with the S&P 500 and Nasdaq heavily concentrated in AI stocks and experiencing increased use of leveraged ETFs and zero-day options by retail investors, potentially foreshadowing an AI bubble burst similar to the dot-com crash.