When central banks raise or cut interest rates, they change the cost of money for the entire economy — reshaping everything from mortgage payments to how attractively priced stocks look compared to bonds. Few single forces move markets more.
Central banks (the U.S. Federal Reserve, European Central Bank, Bank of England, and others) set a benchmark short-term interest rate that ripples through the entire economy. Raising that rate makes borrowing more expensive — mortgages, corporate loans, credit cards all get costlier — which cools spending and investment. Cutting it does the reverse, making borrowing cheaper to encourage spending and investment. This is the primary tool of monetary policy, typically aimed at balancing two goals: controlling inflation and supporting employment.
Interest rates affect asset prices through more than one channel. Higher rates make bonds pay more, making them relatively more attractive versus stocks — a genuine competing use of capital. Higher rates also directly reduce the present value of a company's future cash flows (the same discounting logic behind the Valuation lesson in the Intermediate track), which tends to hit high-growth stocks with earnings far in the future hardest, since more of their value sits in cash flows further out.
Markets react not just to what a central bank actually does, but to what it signals about the future. A rate decision that matches expectations often moves markets less than the accompanying guidance about future decisions — a hint of more cuts (or hikes) to come can move markets more than the announced change itself. This is why central bank commentary is watched as closely as the rate decision.
A hypothetical 1-percentage-point central bank rate hike and its typical, illustrative effects across different parts of the economy and markets.
| Area | Typical Direction | Why |
|---|---|---|
| New Mortgage Rates | Rise | Lenders' borrowing costs rise, passed to consumers |
| Bond Prices (Existing) | Fall | Existing bonds' fixed rates look less attractive vs. new higher-rate bonds |
| High-Growth Stock Valuations | Fall | Future cash flows are worth less today at a higher discount rate |
| Currency (Domestic) | Often Rises | Higher rates can attract foreign capital seeking better returns |
A single rate decision ripples across mortgages, bonds, stocks, and currencies simultaneously — this is what makes central bank policy one of the most closely-watched forces in all of macro investing, and why it sits at the start of this track.
Enter a hypothetical discount rate change and how far out a company's cash flows are weighted — see the estimated effect on today's valuation.
Model: present value = future cash flow ÷ (1 + discount rate)^years. A simplified single-cash-flow illustration of the discounting logic behind why rate changes hit longer-dated cash flows harder — real valuations discount many years of cash flows at once.
Answer all five, then hit "Check My Answers" to see how you did. Get one wrong? No problem — the explanation will show you exactly why.
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You now understand how a central bank's policy rate moves everything. The next lesson shows how the bond market itself prices in expectations about where that rate is headed.