# S&P 500 Holds Firm as 10-Year Treasury Yield Hits 5.36% on AI Market Boom

- URL: https://stocks.freetheai.org/news/s-p-500-holds-firm-as-10-year-treasury-yield-hits-5-36-on-ai-market-boom-eee489
- Published: 2026-10-11T13:37:54Z
- Category: macro; sentiment: bullish; impact: medium
- Symbols: [SP:SPX](https://stocks.freetheai.org/symbols/SP-SPX)
- Written by our AI from expert market sources across the web for FreeTheAI Stocks, built by Vibhek Soni
- How write-ups are made: https://stocks.freetheai.org/how-we-write
- Not financial advice: https://stocks.freetheai.org/disclaimer

The S&P 500 (SP:SPX) rose 0.59% to 7,812 even as the 10-year Treasury yield briefly touched 5.36% earlier in the week, marking its highest point since 2002. Yields have surged 112 basis points since the end of 2025, but equities have resisted the typical downward pressure associated with rising borrowing costs.

Historically, higher interest rates weighed heavily on stock valuations once yields crossed specific thresholds, such as 4.5% before 2008 or 3.5% between 2009 and 2021. However, the top 10 companies now represent approximately 40% of the S&P 500 index. Many of these megacap technology firms are driven by massive capital investments in artificial intelligence infrastructure rather than general economic cycles, weakening the traditional relationship between interest rates and equity performance.

Instead of focusing solely on interest rate levels, investors should monitor artificial intelligence capital spending, how effectively mega-cap technology firms monetize those investments, and the broader adoption of AI across various industry sectors.

## Key points

- The 10-year Treasury yield briefly touched 5.36%, its highest mark since 2002, after climbing 112 basis points since late 2025.
- The S&P 500 (SP:SPX) gained 0.59% to 7,812, showing resilience despite historically high borrowing costs.
- The top 10 companies now account for nearly 40% of the S&P 500, with earnings heavily tied to the artificial intelligence boom.
- Key drivers to watch include tech spending on AI infrastructure, monetization efforts, and technology adoption across broader sectors.

## Questions and answers

### Why are stocks holding up despite 5% Treasury yields?

Mega-cap technology companies make up roughly 40% of the S&P 500 and are driven by artificial intelligence investment rather than traditional borrowing cost sensitivity, helping stocks stay resilient.

### How high did the 10-year Treasury yield rise?

The 10-year Treasury yield briefly touched 5.36%, reaching its highest level since 2002 after advancing 112 basis points since the end of 2025.

### What should stock market investors watch next?

Investors should focus on artificial intelligence capital spending, the ability of technology firms to monetize AI infrastructure, and how widely the technology is adopted across sectors.