You're the Federal Reserve

The Fed has a "dual mandate": maximum employment and price stability (interpreted as ~2% inflation). The problem is these often pull in opposite directions. To fight inflation, you raise rates — which slows the economy and risks layoffs. To boost employment, you cut rates — which can let inflation run hot. Most of monetary policy is navigating this tradeoff, often with limited information and 12-18 month lags between action and effect.

Below is a simplified Fed simulator. Move the rate. Watch the economy react over time. See if you can keep inflation at 2% and unemployment at 4% simultaneously. (Spoiler: you can't, exactly. That's the point.)

What's actually happening when rates change

When the Fed raises the federal funds rate, every other rate in the economy shifts upward. Banks pay more to borrow overnight, so they charge more on loans. Mortgage rates rise, slowing housing demand. Corporate borrowing costs rise, slowing investment and hiring. The dollar strengthens, making imports cheaper but exports less competitive. Stock prices fall (because future earnings are discounted at higher rates). After 12-18 months, this slowdown reduces demand enough to bring inflation down.

The opposite happens with rate cuts. Cheaper credit, more borrowing, more spending, asset prices rise. Eventually, if the economy was already strong, inflation picks up.

The reason this isn't a smooth dial is lags and expectations. The full effect of today's rate change won't be felt until 2027. By then, the economy will be different. The Fed is essentially driving by looking through a fogged windshield with a 12-month delay on the steering wheel. This is why they make mistakes — and why the people calling the shots have outsized influence on the lives of people who never voted for them.