Undoubtedly, on Black Thursday, the AI panic triggered a global stock market crash, but today is different from before in that US bond yields plummeted, while technology stocks plummeted. Explain what? There are a lot of funds selling stocks and flowing into the bond market. treasury bond has not been regarded as a safe haven asset for a long time, and today it has done so. The yields of the Federal Reserve and Benson bonds fell, and they both failed, but the stock market did.