Robert Kiyosaki, the personal-finance author best known for “Rich Dad Poor Dad,” has warned that the “biggest crash in history” has begun, saying a historic downturn in stock and bond markets has started in Europe and could spread across the globe.

The warning came in a post on X published on September 15, 2026, in which Kiyosaki invoked his 2002 book “Rich Dad’s Prophecy” as a forecast of the event he now says is under way.

BIGGEST CRASH IN HISTORY has started. In 2002 I released RICH DADS PROPHECY. This book written to prepare people to profit and not be victims of the biggest stock and bond market crash in history…. a crash that was still coming. In 2026, that crash started, in Europe…

— Robert Kiyosaki (@theRealKiyosaki) September 15, 2026

Kiyosaki said the downturn began in Europe and Japan and could spread globally, according to a report by the Economic Times. He pointed to speculative enthusiasm around artificial intelligence, war, elevated debt levels, and demographic pressures as forces behind his warning, and urged caution around retirement savings. The post itself offered no timeline or magnitude for the claimed downturn — specifics that would be needed to test it against market evidence.

First published in 1997 and co-authored with Sharon Lechter, “Rich Dad Poor Dad” became one of the best-selling personal finance books ever released and established Kiyosaki as a prominent commentator on money and investing. That publishing history is relevant context: Kiyosaki’s following rests on retail readers rather than institutional research desks, and his market calls circulate primarily through that audience. “Rich Dad’s Prophecy,” published five years later, warned that a severe crash across both stocks and bonds still lay ahead — the scenario Kiyosaki now says began to unfold in 2026. The new post therefore marks a shift from forecasting a future event to declaring one already in motion.

For years, Kiyosaki has urged investors to hold hard assets such as gold, silver, and Bitcoin as against what he describes as fragile fiat monetary systems, and his latest warning extends that long-running theme to stocks and bonds. That track record is useful context for the newest iteration: similar warnings have been a consistent thread in his public messaging since the 2002 book, tied to the same thesis of fragile fiat systems and hard-asset protection.

His comments represent a personal forecast rather than a consensus market view; the Economic Times report did not cite independent market data supporting the claim that a historic crash had begun. For readers tracking the claim, the natural checkpoints ahead are any follow-up from Kiyosaki on timing and scope, and independent market data — index performance, bond yields — that would either corroborate or contradict the framing.