Surging Treasury yields sent the stock market a warning on Friday amid a sell-off in global bonds.The 30-year Treasury yield (^TYX) rose 10 basis points to reach 5.12%, its highest level since June 2007. The 10-year benchmark yield (^TNX), meanwhile, climbed 11 basis points to 4.57%, its highest level since May 2025. Bond yields and prices move in opposite directions, meaning that when yields rise, prices fall.Both bonds broke above the key psychological levels of 5% and 4.5%, respectively. As Yahoo Finance’s Jared Blikre has written before, the 5% zone for the so-called long bond represents a danger zone that...