Interest Rates

A rate decision begins as something almost absurdly small. The Fed's committee changes a target for overnight loans between banks — a market most people will never touch. On its own, that overnight rate matters to almost no one. Its power comes entirely from what it's connected to. The committee is pulling one end of a very long chain and trusting that the tug travels all the way down to a car loan in Ohio.

The first links move fast. Because banks can always borrow overnight at roughly the benchmark, no one will lend for a slightly longer term at a worse deal, so short-term market rates snap into line within hours. From there the effect climbs the ladder of maturities. Longer-term rates — the two-year, the ten-year — depend less on today's benchmark than on where markets expect it to sit for years to come. That's why a central bank's words can matter as much as its actions: a hint about the future path of rates can move a ten-year bond before a single decision is made.

For most of modern history, the interesting question was how high rates should go. After the 2008 financial crisis, and again in 2020, the question flipped: what happens when the benchmark hits zero and there's nowhere left to cut? A central bank's normal move — lower the price of borrowing to coax spending back — runs into a floor, because no one will lend at meaningfully negative rates when they can simply hold cash instead. This is the zero lower bound, and it turned a familiar tool into a puzzle.

The response was to work on the long end of the chain directly. Through quantitative easing, central banks created new money and bought vast quantities of government bonds and other assets, pushing their prices up and their yields down. The Fed's balance sheet swelled from under a trillion dollars before 2008 to roughly nine trillion by 2022. The aim was to flatten longer-term rates when the short-term lever was stuck at the floor — to reach past the benchmark and lean on the ten-year directly.

Step back from the machinery and a rate looks less like a technical setting and more like a switch that moves money between groups of people who never negotiate with each other. Because a rate is simultaneously the reward for saving and the cost of borrowing, every change hands something to one side and takes it from the other. Raise rates and savers, bondholders and cash-rich institutions collect more; borrowers, indebted firms and anyone with a mortgage pay more. Cut them and the flow reverses. No one votes on this transfer, yet it is one of the largest in any economy.

The pattern isn't random. Cheap money tends to reward those who already own assets, because it inflates the price of the shares and property they hold, while offering little to the saver with cash in the bank. That is part of why the long era of low rates coincided with widening gaps in wealth: the return on capital held up while the return on savings collapsed. Expensive money does something closer to the opposite, rewarding the patient saver and squeezing the leveraged borrower — including the most leveraged borrower of all, the government, whose interest bill balloons as rates rise.

The story that ran from zero in 2020 to above five percent three years later was never really about a percentage. It was about the price of time being cut to almost nothing and then abruptly restored, and about the long chain that carried that change from an overnight lending market into every mortgage, pension and government budget. The committee pulled one small lever; the tug travelled, with a lag and a limp, all the way down to the household deciding whether it could still afford the house it wanted last year.