What if I told you there’s a trade so massive, so deeply woven into global finance, that when it unwinds, it can crash stock markets from Tokyo to New York in a matter of hours?

Welcome to the yen carry trade.

You walk into a Japanese bank. They lend you money at basically 0% interest (or even negative rates)

You take the Japanese yen and immediately convert it to dollars, euros, or whatever. Then you invest that money in higher-yielding assets—U.S. Treasury bonds paying 4%, stocks, real estate, Bitcoin, etc.

The difference between what you’re paying (near zero) and what you’re earning (4%+) is your profit.

Free money, right?

But here’s the thing...

This trade only works if one critical thing stays stable: the yen-to-dollar exchange rate.

Let’s say you borrow 1 million yen when the exchange rate is 150 yen to 1 dollar. You convert it and get $6,667. You invest that in U.S. bonds paying 4%, and you’re making money.

But here’s the kicker...

When it’s time to pay back that loan, you need to convert your dollars BACK into yen. And if the yen has strengthened against the dollar since then, well then you’re up the creek without a paddle.

And now that “free money” trade you had has become a painful loss.

And get this... because EVERYONE is doing this trade (hedge funds, banks, corporations, wealthy investors), when the yen starts strengthening, everyone rushes to close their positions at the same time.

They all sell their assets. Convert back to yen. Pay off loans. Simultaneously.

Now estimates are all over the place about how much in funds are wrapped up in the Yen Carry Trade.

The lower end estimates around $1 Trillion and upper ends say $20 Trillion.

In August 2024, the yen carry trade partially unwound. The Bank of Japan hinted at raising interest rates (making yen borrowing more expensive), and the yen strengthened rapidly.

Markets around the world tanked. The Nikkei 225 had its worst day since 1987. U.S. stocks dropped. Bitcoin crashed from $62K to $50K in days.

Why? Because traders were liquidating EVERYTHING to cover their yen positions. Stocks, bonds, crypto—all getting sold for the traders of the world to cover themselves.

Bitcoin and other crypto’s are hit especially hit hard because they provide 24/7 liquidity.

The yen carry trade has become one of the foundational trades of global finance since 1999, when Japan first dropped its rates to zero.

It’s kept the yen artificially weak (which helps Japanese exports).

While also pumping liquidity into global markets and inflating asset prices from tech stocks to real estate.

So what happens when the Yen parties over?

Right now, the interest rate on the Yen is .5%.

Sounds paltry, until you remember we are talking about trillions of dollars in assets flowing through this one singular trade with rumors that the Bank of Japan is going to be raising rates even higher.

Chances are this will drive the price of other liquid assets down, including Bitcoin and other cryptocurrencies.

So if you’re into Bitcoin or frankly any other type of trading, be ready for that dip.

The yen carry trade is essentially borrowing cheap in one country to invest expensive in another, betting that exchange rates stay stable.

When it works, it’s a money printer.

When it doesn’t, it’s a contagion that spreads across every asset class, every market, every continent.

It’s the ultimate reminder that in global finance, everything is connected. And sometimes, the thing that breaks isn’t the obvious risk—it’s the “free money” trade that everyone thought was safe.

Now whenever the Yen Carry Trade unwinds it’s a big deal.

In fact it wasn’t the largest factor but it was a major contributing factor to the 2008 financial crisis and exacerbated an even bigger issue.

And we just had an unwind of this trade again fairly recently on July 31st, 2024 where after being announced Bitcoin dropped in price 5%. Basically a Tuesday in Bitcoin world.