TradingKey - Following the announcement of the Fed's September interest rate decision, U.S. stocks fell in response. So why does a Fed rate hike cause U.S. stocks to fall?

On September 16, the Federal Reserve raised the target range for the federal funds rate by 25 basis points to 3.75%-4.00%, marking its first rate hike in over three years, with 12 FOMC voting members unanimously supporting the decision. The Fed stated that the U.S. economy continues to grow at a solid pace, but inflation remains elevated, making it necessary to raise interest rates to drive inflation down further.

More importantly, the Fed's September dot plot raised the median forecast for the federal funds rate at the end of 2026 from 3.8% in June to 4.1%, implying that a majority of officials believe further monetary policy tightening is still needed within the year.

Following the news, U.S. stocks reversed gains to close lower. The Dow Jones Industrial Average closed down 1.21%, the S&P 500 fell 0.45%, and the Nasdaq Composite dipped 0.01%; the 2-year U.S. Treasury yield rose 7.5 basis points to 4.738%, while the 10-year U.S. Treasury yield rose to around 5%.

Why Do Fed Rate Hikes Cause US Stocks to Fall?

Fed rate hikes do not directly cause stock prices to fall; instead, they influence U.S. equities through valuations, corporate borrowing costs, economic demand, and yield competition among asset classes.

The most direct impact stems from stock valuations. Stock prices fundamentally reflect investor expectations of a company's future cash flows. Because a dollar earned in the future is not equivalent to a dollar today, investors must use a discount rate to calculate the present value of a company's future profits.

When the Fed raises interest rates, U.S. Treasury yields typically rise alongside them, elevating the market's risk-free rate and boosting the discount rates used in equity valuations. For the same company, even if future earnings expectations remain completely unchanged, the present value of its future cash flows will decline in a higher interest rate environment.

This is why high-valuation growth and tech stocks are typically particularly sensitive to interest rates. For companies such as Nvidia (NVDA), Microsoft (MSFT), and Amazon (AMZN), investors buying their stock are largely paying for future years of earnings growth. When long-term interest rates rise, the discounted value of long-dated profits declines, which can put pressure on their valuations.

Why Rising US Treasury Yields Make Stocks Less Attractive?

Assuming the 10-year U.S. Treasury yield is only 2%, investors seeking higher returns may be more willing to invest in equities.

However, if the 10-year U.S. Treasury yield rises to 5%, the situation changes.

U.S. Treasuries are generally regarded as a vital risk-free yield benchmark in financial markets. When risk-free assets themselves can offer higher yields, a portion of capital may reduce equity allocations and shift into bonds.

Therefore, high interest rates exert dual pressure on U.S. stocks:

On one hand, they increase the discount rate for stock valuations; on the other hand, they enhance the attractiveness of bonds relative to stocks.

Following the September FOMC meeting, the 10-year U.S. Treasury yield rose back to around 5%, putting simultaneous pressure on the S&P 500 and the Dow Jones Industrial Average.

Rate Hikes Will Also Increase Corporate Borrowing Costs

For corporations, business operations do not rely entirely on internal funds. Building factories, expanding data centers, acquiring competitors, or even repurchasing shares may all require bank loans or bond issuances.

When the Federal Reserve raises interest rates, funding costs across the entire financial system usually rise as well. Assuming a company previously needed to pay an interest rate of only 4% to issue bonds, its financing costs could increase to 5% or even higher in a high-rate environment. As interest expenses rise, corporate net profits and free cash flows can be squeezed. This impact is often more pronounced for real estate, automotive, highly leveraged enterprises, and growth companies that require continuous financing.

In recent years, major tech companies have deployed massive capital to build AI data centers. If long-term U.S. Treasury yields remain at elevated levels, financing costs and return on capital will also become key variables for investors evaluating AI capital expenditures.

Rate Hikes May Also Reduce Consumption and Corporate Investment

Federal Reserve rate hikes affect not only Wall Street, but also everyday consumers.

Interest rates on mortgages, auto loans, credit cards, and corporate loans can all be affected by changes in the policy rate.

When consumers have to pay more interest each month, the funds available for shopping, travel, purchasing vehicles, and other spending may decrease.

Faced with higher financing costs, businesses may also delay factory expansions, hiring, or other investment plans.

If consumer spending and corporate capital expenditure slow down, it could ultimately feed through to the revenue and earnings of listed companies.

Therefore, the impact of Fed rate hikes on stocks is not limited to "lower valuations"; it may also further alter companies' future earnings growth rates.

Which US Stocks Are Most Sensitive to Rate Hikes?

Different sectors are affected by rate hikes to varying degrees.

Find out more