The S&P 500 has convexity if earnings keep growing while the 10-year yield eventually falls from 5.3% back toward 4-4.5%. The index is near record highs yet getting cheaper relative to expected growth, because earnings are rising faster than prices. Treasury yields above 5% have compressed the multiples investors pay for future growth, while the AI capex cycle expands the earnings base; those two enormous forces are pushing against each other. x.comÂ