Investiční slovník
Interest Rate: Why One Term Moves Entire Markets
Key takeaways
- An interest rate determines the cost of borrowing money and influences the entire economy.
- Rising rates make credit more expensive, slow the economy, and push down bond and equity prices.
- Falling rates stimulate investment but can fuel inflation.
- The CNB sets the base rate for the Czech Republic; the ECB for the eurozone; the Fed for the US.
- An investor should understand the rate environment, because it affects the valuation of all assets.
An interest rate is the price of money over time — it expresses how many percent you pay for a loan or receive for savings over a given period, and through this single number central banks influence the entire economy.
Why Interest Rates Are So Powerful
Money has time value — 100 CZK today is worth more than 100 CZK in a year's time, because it can be invested or consumed immediately. An interest rate formalizes this time price of money. If a central bank raises rates, all borrowing becomes more expensive: mortgages, corporate loans, consumer credit. Economic activity slows, inflation falls. Lowering rates works in reverse — it stimulates but risks overheating and inflation.
How Rates Move Asset Prices
This is the most important connection for an investor. The value of a bond or a share is calculated as the sum of future cash flows discounted to today's value. Higher rates increase the discount factor — future profits and coupons are worth less in today's money. Therefore:
- Bonds: When rates rise, their price falls (existing bonds with a lower coupon are less attractive)
- Equities: Higher rates reduce valuations (especially of growth companies with distant future profits)
- Real estate: More expensive mortgages reduce demand and push prices down
- Cash and savings products: Higher rates are favorable for them
The CNB, ECB, and Fed: Three Rates to Watch
A Czech investor is affected by three central banks. The CNB sets the repo rate, which influences Czech savings and lending products. The ECB influences the eurozone — where many ETFs are denominated and where the largest trading partners reside. The Fed sets US rates, which through global capital flows affect even global equity markets. Understanding this triangle helps explain why markets react to every central bank meeting. For deeper context, an overview of risk factors provides more background.
FAQ
What is an interest rate in simple terms?
The price of money over time — the percentage you pay for a loan or receive for savings per year. By setting rates, central banks influence how expensive it is to borrow and how attractive it is to save.
Why do interest rates affect equity prices?
The value of an equity is calculated as the discounted sum of future profits. With higher rates the discount factor is larger, so future profits are worth less in today's money — equities should therefore be valued at less. This applies especially to growth stocks.
How do rates affect bonds?
Inversely: when rates rise, prices of existing bonds fall, because their fixed coupons are less attractive compared with new issuances. When rates fall, existing bonds with higher coupons appreciate.
Which rate should a Czech investor watch?
Primarily the CNB repo rate (for koruna-denominated products), the ECB rate (eurozone, euro assets), and the Fed Funds Rate (US market, global capital flows). All three affect different parts of a typical Czech portfolio.