Consider a thought experiment that Milton Friedman would have appreciated: Suppose a central bank artificially suppresses the cost of borrowing for fourteen consecutive years. Not through genuine increases in saving — through the printing press. What happens to the price of assets most Americans finance with debt?
You don't need a model to answer that. You need a calendar and a Zillow account.
From late 2008 through 2022, the Federal Reserve maintained its benchmark federal funds rate at or near zero percent — a policy so unprecedented it required its own acronym: ZIRP, for Zero Interest Rate Policy. The consequences for housing markets were predictable in theory, stunning in practice, and devastating for an entire generation of would-be homeowners.
The Mechanism: Why Cheap Credit Inflates Asset Prices
The Austrian economist Friedrich Hayek articulated the core mechanism almost a century ago. When a central bank suppresses interest rates below the natural rate — the rate that would prevail in a free market with genuine savings — it sends a false signal. Borrowers believe credit is cheap because the supply of real savings has increased. They haven't. The cheap money is manufactured from nothing, not derived from voluntary deferral of consumption.
The result, as Hayek described in Prices and Production (1931), is malinvestment: capital flows into projects that only appear profitable under artificially cheap financing. For housing, this means buyers can afford to bid higher, developers can afford to build at thinner margins, and speculators can afford to hold properties with negative cash flow. Everyone chases assets whose returns are amplified by leverage that has been made artificially cheap by monetary policy.
Milton Friedman, who disagreed with Hayek on some particulars, concurred on the essential point: money supply manipulation distorts price signals throughout the economy. When the Fed's intervention specifically targets mortgage-backed securities — as it did in its quantitative easing programs — the distortion concentrates directly in housing markets.
Fourteen Years at Zero: What the Record Shows
The Federal Reserve first cut rates to the zero lower bound in December 2008, responding to the financial crisis. It kept them there until December 2015 — seven years. After a brief, tentative tightening cycle that brought rates to just 2.25–2.50 percent, the Fed cut back to zero again in March 2020 in response to the pandemic. Rates remained near zero until March 2022.
In January 2021, the 30-year fixed mortgage rate hit 2.65 percent — the lowest level in the survey's 50-year history, according to Freddie Mac's Primary Mortgage Market Survey. For buyers, this was a gift: a $400,000 mortgage at 2.65 percent cost roughly $1,618 per month in principal and interest. At a more historically normal 6.5 percent rate, the same payment could only service a $256,000 loan — a $144,000 difference in purchasing power.
Buyers responded rationally to the incentives they faced. They bid up home prices to capture the additional purchasing power the Fed had handed them. The result was not subtle. According to the Federal Reserve Bank of Chicago, the price of the typical U.S. home increased by 40 percent from January 2020 through August 2022, based on the Zillow Home Value Index. A 2025 Brookings Institution study found that the average value of a house rose by nearly $100,000 in just those two years — a "sudden shift from pre-pandemic trends of slow and steady appreciation between 2012 and 2020."
The Fed's Own Admission
In October 2025, Federal Reserve Chair Jerome Powell provided an unusually candid postmortem. Speaking at the National Association of Business Economics conference in Philadelphia, Powell acknowledged that "with the clarity of hindsight, we could have — and perhaps should have — stopped asset purchases sooner," according to American Banker.
The asset purchases in question were direct purchases of mortgage-backed securities. The Federal Reserve Bank of Dallas documented that the Fed purchased a total of $580 billion in agency MBS in just the two-month period of March–April 2020 alone, then continued purchasing at a rate of $40 billion per month through October 2021. This was not a neutral stabilization measure. It was direct intervention in the market for home loans — intervention that suppressed mortgage rates and, as the data confirm, inflated home prices.
The Brookings study found that the Fed's QE program resulted in the Fed buying nearly 90 percent of the increase in eligible mortgages from 2020 to 2022. When a single buyer — with unlimited purchasing power — acquires 90 percent of new issuance in any market, prices will rise. This is not a controversial proposition. It is elementary supply and demand.
Who Paid the Price
The beneficiaries of ZIRP and pandemic-era QE were people who already owned assets. Homeowners saw their equity surge. Institutional investors holding real estate portfolios recorded windfall gains. The losers were everyone else — renters, first-time buyers, young workers entering the workforce after 2012 who had not yet accumulated enough capital to enter the housing market.
Thomas Sowell has written extensively about how well-intentioned government policies create concentrated benefits for the politically connected while distributing diffuse costs across the general public. Housing finance policy fits the pattern precisely. The Federal Reserve's low-rate regime was advocated by, and primarily benefited, institutional borrowers, existing homeowners, and the financial sector. The costs — measured in the form of housing prices that had risen 44 percent above pre-pandemic levels by mid-2023, according to Redfin data — fell on first-time buyers and renters who had no offsetting asset appreciation to cushion the blow.
The pain persists. As of late 2025, Tufts University economist Jeffrey Zabel found that the annual homeownership cost of a median-priced U.S. house consumed 47 percent of median household income — exceeding the peaks recorded before the 2008 financial crisis.
The Lock-In Effect: When the Bubble Freezes in Place
Low interest rates create a secondary trap that compounds the original damage. Millions of homeowners who refinanced at 2–3 percent rates between 2020 and 2022 now face an impossible trade: selling their home means surrendering a sub-3 percent mortgage and taking on a new mortgage at 6–7 percent. The rational response is not to sell — creating the "lock-in effect" that has drained inventory from markets across the country.
This is the hallmark of an Austrian-style malinvestment cycle playing out in slow motion. The bubble was inflated by artificial credit expansion. But unlike the 2008 cycle, the bust has not materialized as a price collapse — it has materialized as a liquidity freeze. Prices remain elevated. Inventory is constrained not by genuine demand for owner-occupation but by the perverse incentive structure created by the Fed's own prior intervention. Renters and would-be buyers are trapped outside a market that has been warped by policy, not by organic economic forces.
What a Market-Based Rate Structure Would Have Looked Like
It is worth asking what the counterfactual looks like. Had the Federal Reserve allowed interest rates to reflect the genuine supply and demand for loanable funds — rather than suppressing them through asset purchases and near-zero policy rates — mortgage rates would have been higher throughout the 2010s and into the 2020s. Home prices would have been lower. Buyers would have been constrained by genuine purchasing power rather than by artificial leverage amplification.
The result would not have been a housing crisis of a different kind. It would have been a housing market. One in which prices tracked incomes, builders responded to genuine demand signals, and a 28-year-old with a solid job history could reasonably aspire to buy a first home — not because rates were artificially cheap, but because prices had never been artificially high.
That market never materialized. Instead, the Federal Reserve spent fourteen years running an experiment in what happens when you price the cost of money at zero. The answer is documented in the S&P Case-Shiller Index, in the FRED database at the St. Louis Federal Reserve, and in the financial circumstances of every millennial and Gen Z household that has been priced out of homeownership. The experiment failed. The cost was paid by precisely those people with the least ability to absorb it.
The Policy Takeaway
The lesson is not that central banks should never intervene in financial crises. It is that unconventional monetary policy — particularly direct purchases of mortgage-backed securities and sustained periods of negative real interest rates — carries real costs that are not distributed evenly. The beneficiaries lobby loudly to maintain low rates. The victims, scattered across the renter population and the first-time buyer market, have no equivalent institutional voice.
Market-based interest rates are not a hardship to be managed. They are a signal system — one that, when allowed to function, coordinates decisions about saving, investment, and housing construction in a way that no central bank committee can replicate. The housing affordability crisis is, in substantial measure, the price America has paid for suppressing those signals for fourteen years.
