Most policy debates treat inflation as a single phenomenon. It is not. Different causes require different responses, and the CPI only captures part of the picture. The four mechanisms matter because the Fed's tools work on one of them and mostly cannot touch the others.
Demand-pull is "too much money chasing too few goods." Cost-push is a supply shock. Monetary inflation is new currency diluting the existing stock. Asset-price inflation is the Cantillon Effect, new money lifting stocks and housing before reaching consumer prices. The CPI captures demand-pull and some of the others in consumer-basket form, but misses monetary and asset-price inflation almost entirely. That is why official CPI can read 3% while your real cost of living is rising at 7% and the stock market is up 20%.
Policy responses depend on which type of inflation is driving the numbers. Raising interest rates cools demand, which works for demand-pull inflation. It does nothing about an oil supply shock. It does nothing about money already printed and circulating. And it does little about asset-price inflation that is compounding in 401(k)s and home equity while wages lag.
When a politician says "inflation is under control" because CPI fell from 9% to 3%, that is one measurement of one kind of inflation. The cumulative damage from the 2020–2024 monetary expansion is permanent, CPI falling back to 3% does not unwind the 40% M2 expansion[1] that caused the run-up.
Too much money chasing too few goods. Buyers want to spend more than producers can supply, and producers respond by raising prices.
2021–2022. Stimulus checks and expanded unemployment benefits put trillions of dollars into household accounts. At the same time, pandemic supply-chain disruptions reduced the availability of goods (semiconductors, used cars, shipping capacity). The result was a textbook demand-pull surge: plenty of cash, limited goods, fast price increases. CPI peaked at 9.1% in June 2022[2].
The Fed's tool: raise interest rates to cool demand. This is the one type of inflation the Fed's playbook addresses. Higher rates make borrowing more expensive, which slows spending, which lets supply catch up. It is not free, it causes recessions, but it works.
A supply shock drives up the cost of producing everything else. Energy, labor, raw materials, when the cost of inputs rises, the cost of outputs rises downstream.
1973 OPEC oil embargo. Crude quadrupled in price[3]. Everything that uses energy (which is everything) got more expensive. This was not caused by too much money. It was caused by oil exporters cutting supply.
The Fed's tool: mostly useless. Raising rates does not create more oil. You get stagflation, inflation plus recession simultaneously, because the supply shock hits output and prices at the same time.
The 1970s stagflation era is the historical warning. The Fed's attempts to fight cost-push inflation with rate hikes produced multiple recessions without solving the underlying energy problem. It took Volcker's willingness to crush the economy with 20% rates to break the inflation expectations that had embedded, plus the eventual resolution of the energy supply shock itself.
Expansion of the money supply causes all prices to rise over time. This is Milton Friedman's definition: "Inflation is always and everywhere a monetary phenomenon."
M2 money supply grew from $15.4T in February 2020 to $21.7T by April 2022, roughly 41% in 25 months[1]. That is the monetary expansion. Everything else, supply chain disruptions, stimulus, Fed policy, fed into it. The monetary expansion is not fully captured by CPI because CPI measures a basket of consumer prices, not the money stock.
Monetary inflation works with a lag. New money takes time to circulate, time to bid up prices, time to show up in the basket BLS measures. Some of it never shows up in CPI at all because it goes into assets (see Type 4). But the purchasing power of each dollar, over long horizons, tracks the money supply more closely than any consumer-basket index.
The Fed is the cause here. Monetary inflation is the type of inflation where "the Fed" is not a tool but the source. Quantitative easing, large-scale asset purchases, and reserve expansion all increase M2 directly or indirectly. There is no rate-hike fix for money already created and circulating.
New money flows into assets (stocks, real estate, Bitcoin, art) before it reaches consumer goods. This is the Cantillon Effect in action: whoever receives the new money first can buy assets at pre-inflation prices and sell them at post-inflation prices.
Between March 2020 and early 2022, the S&P 500 rose roughly 100%[4] and the Case-Shiller National Home Price Index rose about 40%[5]. Over the same period, official CPI rose roughly 15% cumulative. Asset owners saw their net worth balloon while wage earners saw roughly flat real wages. That gap, the difference between asset-price inflation and consumer-price inflation, is the mechanism behind widening wealth inequality since 1971.
The CPI does not measure asset prices. By construction, the CPI basket is consumer goods and services, groceries, housing costs (imperfectly, via owner's equivalent rent), energy, apparel, medical care. Stock prices, home prices (as a capital asset), and Bitcoin are excluded. This is the technically correct design choice for what CPI is supposed to measure. It also means official inflation numbers miss the channel through which most monetary expansion actually expresses itself.
See /monetary-system/cantillon-effect/ for the 300-year-old framework that explains why new money moves through assets before goods.
The Consumer Price Index is a useful benchmark. It is not a complete measurement of purchasing-power loss. Four methodological choices limit what it captures:
The Federal Reserve's 2% inflation target is not arbitrary and not malicious. The strongest version of the pro-central-bank case deserves a hearing on its own terms before anyone rebuts it. There are real reasons mainstream economists settled on this number.
When prices are falling, people delay purchases. If a laptop will be 5% cheaper next month, you wait. That delay reduces current demand, which reduces production, which causes layoffs, which reduces demand further. It feeds on itself. The Great Depression was partly a deflation spiral; U.S. consumer prices fell roughly 24% between 1929 and 1933[8]. Japan has spent three decades fighting its own deflationary pull with limited success. Central banks learned from both episodes. A small positive inflation rate keeps the wheels turning.
If the inflation target were 0%, a recession could require the Fed to cut real rates negative. But the nominal federal funds rate cannot easily go below zero without extraordinary measures (negative-rate policy, as tried in Japan and the ECB, has mixed results and political costs). A 2% inflation cushion gives the Fed room to maneuver: cutting a nominal rate from 4% to 1% during a downturn is a meaningful tool. Academic work going back to Bernanke, Reinhart, and Sack (2004) formalized this argument[9].
Almost all money in the modern economy is created as debt (see credit creation). A small amount of inflation makes that debt easier to service because the real value of what you owe shrinks slightly each year. For governments running deficits, this is obviously convenient. For a homeowner with a 30-year fixed-rate mortgage, it is a genuine benefit: wages rise with inflation, the mortgage payment does not. The 2% target is not purely a government-friendly trick; millions of ordinary borrowers benefit from it.
The 2% target is defensible in theory. The problem is not the target; it is execution. M2 grew about 41% in 25 months from 2020 to 2022, not 2% annually[1]. The Fed's balance sheet went from roughly $900B pre-2008 to a peak near $8.97T in April 2022[10]. Headline CPI peaked at 9.1% in June 2022[2], not 2%. And there is no mechanism to claw back purchasing power already lost. Prices that rose do not fall back when CPI returns to target; they just stop rising as fast.
Even the target, hit perfectly, compounds. 2% per year for 50 years erodes purchasing power by about 64% ๐ don't trust, verify×DON'T TRUST, VERIFYClaim: 2% compounded over 50 years = ~64% purchasing-power loss.Verify at: BLS inflation calculator ↗Math: 1 − 1/(1.02^50) = 0.6285. The BLS calculator shows cumulative CPI effects on historical data.. The math: 1 − 1/(1.02^50) ≈ 63%. That is the "success case." The actual post-1971 dollar has lost roughly 87% of its purchasing power, closer to 4% annualized. Even theoretical success is not wealth preservation.
Bitcoin's fixed supply removes the question of whether the target gets hit. There is no target. There is no discretion. 21 million coins, issued on a schedule written into the protocol in 2009. Whether the Fed succeeds or fails at 2% does not affect what a satoshi represents.
A fixed-supply asset is neutral with respect to which type of inflation is happening. All four types erode the purchasing power of unbacked fiat over long horizons. None of them can inflate Bitcoin's supply.
Whether inflation shows up in consumer prices (Type 1 or 2), in monetary aggregates (Type 3), or in asset prices (Type 4), the denominator is always the currency. Bitcoin is the only major asset whose supply cannot be expanded to paper over the problem. That is why Bitcoin holders care less about which type of inflation is running hot in any given quarter and more about the long-term trajectory of the currency itself.
The CPI is a useful tool for comparing consumer prices year over year. It is not the complete picture of inflation. Monetary and asset-price inflation can be running at two or three times the official CPI rate and never show up in the headline number. If you benchmark your wealth against CPI, you will feel like you are keeping up while your purchasing power against housing, equities, and scarce assets quietly erodes. Benchmark against hard-supply assets instead.
Last updated 2026-04-18 · Not financial advice. Do your own research.