The Yen Carry Trade Explained: How Cheap Japanese Money Influences US Markets and Global Investors.
For most investors, movements in the US stock market are explained by familiar factors—corporate earnings, interest rates, inflation, economic growth and investor sentiment.
But beneath these visible drivers lies a less understood force that can influence global asset prices: the yen carry trade.
The strategy is simple in principle. Investors borrow in a currency where interest rates are relatively low and use the proceeds to invest in assets that offer higher returns elsewhere.
For years, the Japanese yen has been one of the world’s most important funding currencies.
The significance of this trade goes far beyond Japan. When large numbers of investors borrow yen and move the money into higher-yielding assets overseas, financial conditions can loosen across global markets. When those positions are unwound suddenly, the effect can work in reverse.
That makes the yen carry trade an important piece of the global investment puzzle.
What exactly is the yen carry trade?
The mechanics are relatively straightforward.
An investor borrows money in Japanese yen at a comparatively low interest rate. The borrowed yen are then converted into another currency—often US dollars—and invested in assets offering potentially higher returns.
For example, an investor might borrow at a Japanese interest rate of around 0.75% and invest in US dollar-denominated assets yielding considerably more.
The difference between the funding cost and the return on the investment is the basic attraction of the strategy.
However, there is an important complication: currency risk.
If the yen strengthens sharply against the dollar, the investor may face significant losses when converting the investment proceeds back into yen. That is why carry trades can appear highly profitable during stable periods but become extremely vulnerable when exchange rates, interest rates or market volatility change suddenly.
The Bank of Japan has kept its policy rate around 0.75% in 2026, although Japan is no longer in the ultra-low-rate environment that characterised much of the previous decade.
The Bank for International Settlements, or BIS, describes the yen as an important funding currency for carry trades and notes that such positions can be highly sensitive to exchange rates, interest rates and volatility.
Why does the yen matter to US markets?
The key issue is not simply how much money is borrowed in Japan.
It is where that money ultimately goes.
A yen-funded position can be converted into dollars and invested in US Treasury securities, corporate bonds, equities and other financial assets. Hedge funds and other leveraged investors can also use derivatives such as FX forwards and swaps to create yen-funded positions without necessarily showing up as conventional yen borrowing on their balance sheets.
That makes the true size of the yen carry trade difficult to measure.
The BIS has cautioned that available statistics provide only indirect indicators because much of the activity takes place through derivatives and because yen borrowing can be used for purposes other than carry trades.
Nevertheless, the mechanism is important.
When Japanese funding is cheap, global investors have greater incentive to seek returns abroad.
When the yen strengthens or Japanese interest rates rise, however, the economics of the trade can change rapidly.
Investors may then begin selling overseas assets and buying back yen to repay their funding.
That can create a carry-trade unwind.
The August 2024 warning
The risks became particularly visible in August 2024.
A rapid unwinding of yen carry trades contributed to a sharp deterioration in market conditions, with leveraged investors reducing positions across risky assets.
The BIS subsequently noted that the episode demonstrated how changes in Japanese financial conditions could be transmitted to the United States through leveraged yen-funded positions.
The lesson for investors is important:
Cheap money does not simply disappear when monetary policy changes. It can reverse direction—and when leverage is involved, that reversal can happen quickly.
Is Japan trapped by its debt?
Japan’s economic situation adds another layer to the story.
The country has one of the world’s highest public-debt burdens. IMF projections put Japan’s gross public debt at roughly 200% of GDP in 2026, although the ratio is projected to decline gradually over the medium term.
This creates a difficult policy balancing act.
Higher interest rates can help contain inflation and support the currency, but they can also increase the government’s borrowing costs over time.
At the same time, Japan faces an ageing population, relatively weak long-term demographic growth and a need to maintain economic stability.
However, it would be too simplistic to say that Japan cannot raise rates because its debt would automatically become unsustainable.
The Bank of Japan has already moved away from the zero-rate environment, demonstrating that monetary normalisation is possible.
The more accurate conclusion is that Japan has strong economic and fiscal reasons to proceed carefully with further monetary tightening.
Japan and the United States: A deeper financial relationship
Japan is also one of the world’s major holders of US financial assets.
The two economies are deeply connected through trade, investment, financial markets and security relationships.
For decades, Japanese investors have invested heavily in overseas markets because domestic returns were often relatively unattractive compared with opportunities abroad.
That helped make Japan an important source of international capital.
But it is important not to describe this as a simple system in which Japan is forced to recycle all its export earnings into US Treasuries.
Investment decisions are made by households, pension funds, insurers, banks, asset managers and the Japanese government, each with different objectives.
The broader point is more significant:
Japan’s low domestic returns and its enormous pool of financial capital have helped make the yen an important funding currency for global investment.
What happens when the carry trade reverses?
This is where the story becomes particularly important for investors.
Suppose an investor has borrowed ¥100 million and converted it into dollars to purchase US assets.
If the yen remains weak or stable, the investor can potentially earn the difference between the Japanese funding cost and the return on the US investment.
But imagine the yen suddenly appreciates.
The investor now needs more dollars to buy back the same amount of yen required to repay the original borrowing.
The result can be a double problem:
- The currency position moves against the investor.
- The overseas asset may also have to be sold to raise cash.
If thousands of leveraged investors do this simultaneously, selling pressure can spread across markets.
This is why the yen carry trade matters even to investors who have never borrowed a single yen.
The India connection
There is another part of the global capital story that deserves attention from Indian investors.
India is primarily a large and rapidly expanding consumption and investment economy rather than a global funding centre comparable with Japan.
As Indian incomes rise, consumers increasingly spend on digital services, cloud computing, software, advertising, entertainment, premium technology and global brands.
A significant portion of that spending ultimately contributes to the revenues of multinational companies, including large US technology and consumer companies.
This creates an interesting investment dynamic.
Indian economic growth does not necessarily translate entirely into Indian corporate earnings.
Some of the value created by India’s expanding consumer economy can accrue to global companies that provide the platforms, technology, products and services used by Indian consumers.
For an Indian investor, this raises a strategic question:
Should the portfolio capture only the Indian growth story, or should it also have exposure to companies elsewhere that benefit from India’s growth?
The bigger investment lesson
The yen carry trade should not be viewed as a permanent one-way source of liquidity for US markets.
It is better understood as one component of a much larger global financial system.
US monetary policy, Japanese monetary policy, exchange rates, global risk appetite, institutional asset allocation and leverage all interact with one another.
BIS research has found evidence that easier Japanese financial conditions can transmit into US financial conditions, while the unwinding of yen-funded trades can have the opposite effect.
That makes the yen carry trade particularly relevant during periods of market stress.
When volatility is low and interest-rate differentials are attractive, carry trades can expand.
When volatility rises or the yen strengthens sharply, the same positions can become a source of market pressure.
Should Indian investors own both Indian and US assets?
There is a reasonable investment argument for diversification across both markets—but not because the yen carry trade guarantees that US markets will continue rising.
Indian investors have exposure to India’s domestic growth, consumption, infrastructure and financialisation story through Indian assets.
US investments, meanwhile, can provide exposure to global technology companies, multinational businesses and industries whose revenues extend well beyond the US economy.
For some investors, therefore, holding both Indian and US assets can provide broader exposure to global economic growth.
The important principle is diversification rather than dependence on a single macroeconomic theory.
The bottom line
The yen carry trade is one of the less visible mechanisms connecting Japanese monetary policy with global financial markets.
Its influence is difficult to quantify precisely, and it would be an exaggeration to claim that the trade alone has been responsible for the long-term rise of US markets.
But its importance is real.
Japan’s relatively low interest rates have made the yen an important funding currency, while global investors have used yen funding to seek higher returns in overseas markets.
The reverse can also be powerful.
When the yen strengthens, Japanese rates rise or market volatility suddenly increases, leveraged carry trades can unwind—and that can transmit financial stress across borders.
For Indian investors, the broader lesson is perhaps more important than the carry trade itself.
Capital moves globally. Economic growth in one country can create earnings for companies in another. And the forces that influence asset prices often operate far beyond the headlines investors see every day.
Understanding those connections can help investors look beyond individual stocks and think in terms of the global financial system.
The yen carry trade is one such connection and it is one worth watching.
Credit Money Finance
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