The Case for Renting: Your House Is Two Decisions, and Only One of Them Is an Investment

Everybody has the relative. The one who leans across the table to say renting is throwing money away, that you’d better buy before you’re priced out, that so-and-so got rich just by living in the same house for 20 years. Two economists — Michael Luca of Carnegie Mellon and Ray Fisman of Boston University — spend this weekend’s Journal Review politely taking him apart. Their point: buying a house bundles two very different decisions into one signature — where you want to live, and where a big share of your life savings should go.

Buying captures any price gain, but it ties up the money, and that opportunity cost is the number most buyers never write down. Case-Shiller puts the rise in home prices from December 2015 to December 2025 at about 87%; the S&P 500, with dividends left out, gained about 235% over roughly the same years. The authors say the two aren’t directly comparable — a house is also a place to live — though one of them, after selling his own house in red-hot Boston, worked out that he’d have come out about even renting a comparable place and putting the money in an index fund.

The leverage nobody calls leverage

So why does everyone’s uncle think his house was his best investment? Borrowing. Almost nobody pays cash, and a loan on most of the price multiplies whatever the down payment earns: 20% down plus a 10% rise is a 50% gain on your equity. In reverse, a 10% drop costs the owner half of what he put in. The authors’ comparison: an adviser who told you to take a six-figure loan and put it all in one stock would be shown the door, yet a mortgage does roughly that, and the debt is so ordinary that nobody calls it leverage.

None of this says don’t buy. The tax code tilts toward owning; renting has costs of its own — a thin supply of good places, a landlord who can decide you’re moving — and nobody has to approve the wall you want gone. Good reasons to own, the authors say — just not reasons to call a home a good investment. This weekend’s price of that leverage: Bankrate’s 30-year fixed is 7.15% in the Journal’s consumer-rates box, a 52-week high, up from 7.05% a week earlier; Freddie Mac’s survey has it at 7.03%. At those rates, borrowing to own isn’t cheap.

Our read

This is a Housing (M6) piece that separates the two questions. Where you live is a life decision, and it’s worth paying for. How you invest is a portfolio decision that answers to the same rules as the rest of your money: diversification, liquidity, an honest look at what you’re borrowing. At 20% down, a house is a five-to-one bet on one asset in one ZIP code — not a reason to avoid it, a reason to know it. And the opportunity cost isn’t theoretical: the three-month Treasury bill, where the desk keeps its safe money, closed Friday at 4.24%.

Price the house twice before you sign: once as a home — can you carry the payment, taxes, insurance and upkeep at 7.15% without the plan flinching? — and once as an investment: what would the down payment do somewhere diversified? Don’t let 2015 to 2025 answer for you; the authors’ 235% is what the market did, not a promise about what comes next, and this desk is still waiting on its own drawdown dates before it buys the index. Fifteen minutes with the mortgage statement beats hunting for the umbrella in the rain. Or, as the authors put it: “Where you want to live need not be where you want to invest.”