Trump's war and tariffs are having a nasty effect on interest rates

The rates being affected are mainly long-term interest rates on U.S. Treasury bonds. These rates determine borrowing costs for mortgages, business loans, and other debt. The Federal Reserve directly sets a short-term policy rate, but it does not set the yield on every Treasury maturity.

Treasury Secretary Scott Bessent’s announced action involves buying back long-dated Treasuries. When the government buys existing bonds, it can increase demand for those securities and reduce the amount available for investors. Stronger demand usually raises prices, which lowers their yields. The effect is aimed at the longer end of the bond market.

The Fed’s decisions can still influence long-term rates indirectly. Investors consider future short-term rates, inflation, government borrowing, and economic risks when pricing long bonds. But the article’s unusual interventions concern markets beyond the Fed’s direct overnight-rate tool. They show the Treasury trying to manage conditions in the long-term bond market itself.

Long-dated Treasuries are government bonds with distant maturity dates. Common examples include 10-year, 20-year, and 30-year Treasury securities. Their prices and yields are especially important because they influence long-term borrowing costs throughout the economy.

The U.S. government issues these bonds when it spends more than it collects in taxes or needs to refinance existing debt. Selling a 30-year bond provides money today while spreading repayment far into the future. Investors receive scheduled interest payments and repayment of principal at maturity. The government therefore gains funding, while investors receive a highly traded asset.

Long-dated debt also creates risks. If inflation rises, future payments become worth less in real terms, so investors may demand higher yields. The Treasury’s buyback plan matters because it could alter the supply of older, long-maturity bonds in the market. That may improve trading conditions and influence long-term rates, though it does not erase the government’s overall debt.

The Treasury market is one of the world’s largest financial markets. It contains roughly $29 trillion in publicly held, marketable U.S. government debt, though the total changes as the government borrows and repays. Its size allows investors worldwide to buy and sell Treasury securities quickly.

Long-dated bonds are only one part of that market. Using a broad definition of 10 years or more to maturity, roughly $6 trillion to $7 trillion can be viewed as long-dated debt. The figure varies with the cutoff date, maturity definition, and whether one measures all outstanding securities or only publicly held debt. Treasury bills and shorter notes make up the rest.

This scale explains why even a large-sounding buyback may be modest compared with the overall market. The article says Bessent could double long-dated Treasury repurchases, but it does not provide the final dollar amount here. The purchases could still affect particular maturities, liquidity, and investor expectations without changing total federal debt.

Tariffs raise the price of imported goods and can lift inflation. War can disrupt energy supplies, shipping, and production. Both developments may make investors less confident that inflation will return quickly to low levels. Long-term bondholders then demand higher yields to protect their purchasing power.

War can also increase government spending on defense, aid, or economic support. Tariffs may weaken growth and reduce tax receipts. If investors expect larger deficits and more Treasury issuance, they may require extra compensation to absorb the new debt. More expected supply can put downward pressure on bond prices and upward pressure on yields.

The immediate market response is not always higher rates. During a sudden crisis, investors often buy Treasuries because they are viewed as relatively safe, pushing prices up and yields down. The longer-term result depends on whether inflation, borrowing needs, and risk dominate that safe-haven demand. Thus tariffs and war can raise long-term rates, but through different and sometimes opposing channels.

When the Treasury buys back its own bonds, it repurchases outstanding securities from investors before they mature. This is different from simply issuing new debt. The government pays cash to bondholders and removes or retires the purchased securities, potentially changing the supply available in the market.

Suppose investors are selling older 20-year bonds and the Treasury becomes a buyer. That extra demand can support prices. Because a bond’s promised payments are fixed, a higher purchase price means a lower yield for a new buyer. If the Treasury doubled its planned purchases, the price effect could become stronger, especially in less liquid long-dated issues.

The impact is not guaranteed or uniform. Investors may anticipate the purchases before they occur, and the Treasury might issue other debt at the same time. Buybacks also do not reduce the government’s total obligations automatically; they exchange one security or funding need for another. Their main possible effects are improved market functioning, altered supply, and lower long-term yields.

Currency-market intervention occurs when a government or central bank directly buys or sells currencies to influence their exchange rate. Buying yen with dollars increases official demand for yen and can support its value. A stronger yen can reduce pressure from imported inflation and calm disorderly market movements.

The article says the U.S. Treasury joined Japan’s efforts in early August by buying Japanese currency. That was unusual because the United States had not taken the same step since the Asian Financial Crisis in 1998. The intervention signaled cooperation rather than leaving Japan to act alone in a stressed currency market.

Such operations can affect prices immediately, but their lasting power depends on market forces. Traders may challenge intervention if economic fundamentals point toward a weaker yen. Results also depend on how much currency officials buy, whether central banks coordinate interest-rate policy, and whether investors believe the authorities will continue. The article presents the action as rare and controversial.

Bond prices and yields move in opposite directions because most bond payments are fixed. If a bond pays $40 a year, paying less to buy it produces a higher return percentage. Paying more produces a lower return. This arithmetic links market prices directly to yields, even before expectations change.

Investors also price long-term risks. Higher expected inflation reduces the real value of future payments, so buyers demand higher yields. Heavy government borrowing can increase the supply of bonds, requiring higher returns to attract buyers. Strong investor demand, including demand for safe and liquid Treasuries, supports prices and pushes yields lower. Weak demand does the reverse.

These forces help explain the article’s focus on long-dated bonds. Tariffs, war, and deficits can raise inflation or borrowing concerns, while Treasury buybacks can add demand for selected securities. The Federal Reserve’s short-term decisions matter too, but long-term yields combine many expectations about the economy, government finances, and future interest rates.