Why high interest rates pose a challenge to the stock market

High interest rates challenge the stock market through several interconnected channels. In modern economics and finance, interest rates are not only the cost of capital but also a central tool of monetary policy and a key input into asset pricing. As central banks raise or cut rates, the effects can spread across financial markets—particularly stocks—by influencing corporate profits, investment cash flows, valuations, and market liquidity.

Mechanisms: how interest rates affect stock prices

In macroeconomics, the interest rate represents the price of capital: what borrowers pay to use money and what savers earn for transferring capital. It also helps balance savings and investment. When rates are low, borrowing costs fall, encouraging firms to expand investment and consumers to access credit more easily. When rates rise, higher borrowing costs can slow investment and consumption.

Central banks therefore use interest rates as a principal monetary policy tool to control inflation and stabilize the business cycle. Rate changes are a major transmission channel from monetary policy to the economy and financial markets.

Valuation effects through discount rates

Interest rates also affect asset values. A core principle of finance is that an asset’s value equals the present value of its future cash flows. In valuation models, the discount rate captures the opportunity cost of capital. When interest rates rise, the present value of future cash flows declines, which can reduce stock valuations and push stock prices lower.

Portfolio reallocation toward fixed income

Higher rates can also change how investors allocate capital. When bank deposit rates or bond yields increase, fixed-income assets become more attractive relative to stocks. This can reduce demand for equities and shift some investment toward less risky channels.

Liquidity and funding conditions

Beyond valuation and borrowing costs, rate tightening can affect liquidity. In tightening cycles, rate hikes are often accompanied by credit controls that reduce liquidity in the economy. When liquidity tightens, the flow of funds into stock markets can shrink, and stock markets may react quickly to signals of monetary policy changes.

Evidence from studies and market history

Economic studies across multiple markets find a relationship between interest rates and stock prices. One study using data from China’s stock market reported a long-run negative relationship between interest rates and stock indices—when rates rise, stock prices tend to fall. Other research suggests that interest rates can help explain stock return volatility, though the size of the effect may vary across the economic cycle.

Global financial history also shows that rate cycles often coincide with stock-market swings. The 2022–2023 period is cited as an example of major central banks tightening policy to control inflation.

United States: faster tightening and balance sheet reduction

In the United States, the Federal Reserve raised rates from near 0% to around 5.25–5.5% in just over a year, while also implementing quantitative tightening to shrink its balance sheet. Rapid rate increases placed pressure on equity valuations, especially for high-growth technology companies whose value depends heavily on future profits. As discount rates rise, the present value of those future cash flows falls, leading to valuation adjustments.

Vietnam: policy-rate hikes and higher deposit yields

In Vietnam, 2022 is described as a period of rapid shifts in the rate environment. Facing global inflationary pressures and exchange-rate volatility, the State Bank of Vietnam raised the policy rate twice in September and October 2022. Market deposit rates rose to about 9–11%, the highest in 14 years.

Market impact and valuation compression in Vietnam

The article also points to additional shocks affecting Vietnamese equities. It cites prosecutions of senior executives at FLC Group, Tan Hoang Minh Group, and Van Thinh Phat Group, which created domino effects and pushed the VN-Index from a peak around 1,538 to about 1,000 points, erasing roughly 35% of value. It further notes that forward P/E valuations across the market compressed from around 16x to about 10x.

Conclusion

From a financial perspective, interest rates are not only a monetary policy instrument but also a central variable in asset pricing. Changes in rates can simultaneously affect a company’s cost of capital, stock valuations, investment cash flows, and market liquidity. Understanding the relationship between interest rates and the stock market is presented as a key starting point for understanding how financial markets operate.

Stay tuned for Part 2: How did Vietnamese stocks move in years of rising rates?