Why Are Stocks and Bond Yields Rising at the Same Time?

Key Points:

• The S&P 500 reached a record high driven by bullish earnings estimates, despite rising Treasury yields hitting a 24-year peak above 5.3%, reflecting strong US economic growth rather than inflation fears.
• Analysts forecast a 29.5% increase in S&P 500 earnings for the third quarter, marking the third consecutive quarter with growth above 25%, bolstering investor confidence across all equity sectors.
• The energy sector's profits doubled due to high oil prices linked to Middle East conflicts, while the AI data center buildout significantly boosted tech sector profits by an estimated 65% in Q3.
• The AI investment surge has increased corporate borrowing and demand for capital, contributing to higher bond yields, but some strategists believe AI spending could sustain market resilience despite rising interest rates.
• Concerns remain about the AI buildout's concentration in a few tech companies and the risk of overcapacity and speculative bubbles reminiscent of the 1990s telecom boom, potentially threatening sustainable growth.