US stocks at record highs despite rate pressure: How resilient is the S&P 500’s all-time high rally?

Despite sharply higher bond yields, the main US stock indices are setting new highs. The S&P 500 moved above 7,800 points for the first time in its history, driven by a continuing investment boom around artificial intelligence (AI). The technology-focused Nasdaq Composite also reached a new all-time high. At the same time, yields on 10-year US government bonds remain at around 5.3%, the highest level in more than two decades. For private investors, the question is how resilient this market environment is and where opportunities and risks lie for their own portfolios.

Record run on Wall Street driven by AI and infrastructure boom

On 6 October 2026, the S&P 500 closed at 7,818.93 points (+0.58%), marking the first time it has finished above 7,800. The Nasdaq Composite simultaneously climbed to a record high of 27,599.89 points (+0.45%). Alongside established semiconductor companies such as Nvidia, AMD, Broadcom and Marvell Technology, the market benefited from the AI rally spreading to the energy sector. In particular, a long-term supply agreement between Google and Constellation Energy over nuclear capacity pushed shares of utilities such as Constellation Energy (+12%), Talen Energy (+12%) and Vistra (+11%) sharply higher.

Historic rate pressure from high US bond yields

Traditionally, rising interest rates weigh on equity valuations, as higher refinancing costs reduce corporate earnings and future profits are discounted more heavily in valuations. Nevertheless, the yield on 10-year US Treasuries at times rose to as high as 5.35% — a level last seen in 2002. The reasons are seen as persistently high US budget deficits, heavy issuance of government debt, and extensive corporate bond borrowing by tech groups to finance expensive AI data centres.

Earnings growth offsets interest burden — market narrowness carries risks

Strong operating earnings growth in the US technology and infrastructure sectors has so far offset the pressure from higher rates. However, market breadth is becoming increasingly narrow: while megacap technology stocks and utilities are lifting the indices, more rate-sensitive parts of the market such as small caps in the Russell 2000 are coming under pressure. In addition, sharply higher crude oil prices and profit-taking in mid-October led to temporary consolidations, during which the S&P 500 briefly fell back below 7,800 points.

What private investors and ETF investors should watch

For investors in global indices such as the MSCI World, concentration risk is continuing to rise because of the heavy weighting of the US tech giants. The course of third-quarter reporting season will be decisive for the rally’s continuation. Investors should closely watch whether companies can maintain their profit margins despite higher interest and energy costs. In the current environment, balance-sheet-strong quality stocks with high free cash flow and low refinancing needs are becoming especially important.

The record run in US stock markets underlines the enormous momentum of the global AI investment cycle. However, US bond yields above 5.3% are a warning to stay alert. Should the upcoming quarterly figures fall short of lofty market expectations, rate pressure could quickly return to the forefront.