Wallstreetcn analysis indicates that the 10-year U.S. government bond yield has surpassed 5%, exceeding the S&P 500's earnings yield, making bonds the most attractive relative to stocks in approximately 25 years. This structural shift poses potential downward pressure on the stock market, breaking the "stocks over bonds" paradigm of the past two decades. Yale economist Robert Shiller's model suggests that the S&P 500 may only outperform bonds by about 1% annually over the next decade.