Yield curve inversion: a recession and crash signal explained

What is yield curve inversion in plain English?

A government bond pays a fixed yield for a fixed period. Plot those yields from 3 months to 30 years and you draw the yield curve. In normal times the line slopes upward, because lenders ask for more yield to wait longer. Inversion means the line slopes the other way: short-term bonds pay more than long-term ones. A common test compares the 10-year Treasury yield with the 2-year note or the 3-month bill.

Economist Campbell Harvey introduced the idea in his 1986 doctoral thesis at the University of Chicago. The upside-down shape is unusual, so it draws attention when it appears. It describes the expectations of bond investors, while shares sit one step further away: the path to a stock market crash runs through the economy and through company profits.

Why does an inverted yield curve point to a recession?

Long-term yields reflect the path of short-term rates that investors expect. A central bank raises its policy rate to slow inflation, and short yields rise with it. If investors expect the slowdown to bring rate cuts later, they buy long-term bonds to lock in income today, and that buying pushes long yields down. The curve flattens and then tips over.

Higher borrowing costs also travel through the economy: loans cost more, hiring cools, and unemployment can rise. The inversion therefore carries two messages at once, tight policy now and weaker growth later. Each message matters for a stock market, because company earnings follow growth, and prices follow earnings over time.

Which yield curve spread should you watch for crash risk?

The New York Fed convention uses the 10-year yield minus the 3-month bill yield, and its recession model relies on the same pair. The 10-year minus 2-year spread is the other popular choice. A negative value on either spread marks an inversion, and the depth of the negative value shows how strongly short rates exceed long rates.

The New York Fed model works on monthly averages, so a brief dip below zero on a single day does not count. In 2019 the 10-year minus 3-month spread inverted on 22 March and reverted by 1 April, and the monthly average first reached zero in May. Averages filter the noise, which keeps the signal clean for a dashboard.

What is the yield curve inversion track record before recessions?

Since 1970, every US recession came after an inversion of the 10-year minus 3-month spread, and every inversion in that period was followed by a recession. Lead times from inversion to recession ranged from 6 to 17 months, with an average of 12 months. The average inversion lasted 7 months before the curve turned upward again.

The record covers 8 recessions, which is a small sample for any statistical claim, and each episode had its own depth and timing. The guide on what happened after past inversions lists every episode with its start, its depth, and its lead time, so you can compare the signal of today with the full set.

What did the yield curve signal before the 2008 financial crisis?

The 10-year minus 3-month spread inverted in August 2006, stayed negative for 10 months, and reached a depth of 51 basis points. The recession began in January 2008 in the Wikipedia table, 17 months after the inversion, while the NBER dates the peak of activity in December 2007. The signal came long before the failures of 2008.

Lehman Brothers filed for bankruptcy on 15 September 2008, more than 2 years after the curve flipped (EQOS Asia 2008 back-test, 2026). The page on what the yield curve said before the crisis follows that episode step by step and shows how one signal sat beside other warnings that year.

When can a yield curve inversion mislead about a stock market crash?

The 10-year minus 2-year spread inverted in July 2022 and turned positive again in early September 2024. Wikipedia reports that the widespread recession calls made during that period had not materialized when it was written. A 2023 article also asked whether awareness of the signal, together with a labor shortage and low indebtedness, made it less predictive.

Deutsche Bank found that in every previous inversion it examined, the curve returned to a normal slope before the recession began. A curve that turns upward is therefore no all-clear. The signal sizes a window and leaves the depth of a fall, and the date of a crash, to other gauges.

How do you use yield curve inversion with other crash signals?

Treat inversion as the background line of your dashboard: slow, public, and easy to refresh each month. Add the fear reading from the VIX index guide to see whether stress is arriving now. Add valuation and jobs data to judge how much a recession could cost. A rising count of warnings lifts the probability of a fall and invites a review of position sizes.

This page is general information, not investment advice. The EQOS Asia method page explains how a structural score complements market gauges, and the Λ simulator gives a first reading on your own case in minutes. Teams in Singapore, ASEAN, and Hong Kong use that pairing to set the size of their exposure.

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About the author

Stéphane Jambu

President, EQOS Forecast Asia

Stéphane Jambu leads EQOS Forecast Asia and works as a consultant in e-commerce, search visibility, and AI. LinkedIn profile