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A stronger yen could raise U.S. borrowing costs, DW explains

Business Beyond traces how Japan's changing interest rates could redirect investment and unsettle the cheap-money trade linking global markets.

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DW News Story of November 7, 2026Trari Newsroom

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Why Japan's yen is becoming a problem for the US I Business Beyond

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3:28The yen carry trade uses cheap Japanese borrowing to finance purchases of higher-yielding foreign assets.
6:50Higher Japanese interest rates make domestic investments more attractive, changing the incentive to send money abroad.
8:00Falling demand for U.S. Treasuries can raise bond yields and borrowing costs.
10:20The FIMA Repo Facility offers dollar funding against Treasury holdings, an alternative to selling the bonds outright.
13:16A rapidly strengthening yen could trigger an abrupt unwind of carry trades, disrupting global markets.
16:14Washington faces competing pressures: supporting currency stability while preserving demand for American debt.

Borrow cheaply in Japan, invest for a better return abroad: for years, that calculation helped send money into American assets. DW News's Business Beyond report examines what happens when the calculation changes, and why the consequences could reach American mortgages and business loans.

Presenter Enno Hinz explains the yen carry trade, in which investors borrow in Japan's low-interest-rate currency to buy higher-yielding assets elsewhere. Japan is also the largest foreign holder of U.S. government debt, with more than a trillion dollars in Treasuries, according to the report.

But rising Japanese interest rates give investors another option: keeping more money at home. DW's analysis explains that weaker demand for U.S. government bonds can push their yields higher, increasing borrowing costs across the American economy.

"It makes buying a home more expensive, borrowing money to grow your company more expensive," says Rebecca Patterson, a senior fellow at the Council on Foreign Relations.

The report also examines Washington's options for supporting the yen without encouraging a sell-off of American debt. One mechanism is the Federal Reserve's FIMA Repo Facility, which allows eligible foreign monetary authorities to obtain dollars temporarily against Treasury holdings rather than selling those holdings outright.

Yet a rapidly strengthening yen brings a different danger. Patterson and State Street Investment Management's Masahiko Loo explain how investors unwinding yen-funded positions could disrupt markets as they sell assets and repay their borrowing.

"Too weak is dangerous. Too strong can also be too dangerous. So Washington wants something in between: a stable yen," Hinz says. That is the dilemma behind DW's report: currency stability matters to Washington not just as diplomacy, but as a condition for keeping its own financing manageable.

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