Why Do Bond Prices Fall When Yields Rise, and What Is the 10-Year Treasury Yield?

A Treasury note is a loan you make to the U.S. government, and its yield is roughly the yearly return you'd earn if you bought it at today's price and held it until it matures. The 10-year Treasury yield is one of the most-watched numbers in markets. On Monday, Oct. 26, CNBC reported the 10-year yield was little changed at about 4.99%, while the 2-year yield rose about 3 basis points to 4.716%. A basis point is one hundredth of a percentage point, so 3 basis points is 0.03%.

Here's the part that confuses almost everyone at first: bond prices and yields move in opposite directions, like two ends of a seesaw. Most bonds pay a fixed amount of interest. When new bonds start paying more, an older bond paying less becomes less attractive, so its price drops until its yield lines up with the market. The SEC's investor education office gives this example: a 10-year bond with a 3% coupon and $1,000 face value would be worth about $925 a year later if market rates rose to 4%. It works the other way too, so when rates fall, older bonds with higher coupons go up in price.

So when you see a headline like "yields climbed," it also means existing bond prices slipped, and the reverse. For context, Dow Jones Market Data says the 10-year yield is about 0.32 percentage point below its 52-week high of 5.310% from Oct. 5, and traders are watching this week's Fed rate decision. This is just how the math works, not a call on where rates go next. Got a question about bonds, yields or basis points? Ask below, there are no silly questions here.

Sources: CNBC, "U.S. Treasury yields: investors look ahead to the Fed's rate decision" (Oct. 26, 2026); Dow Jones Market Data via Morningstar, "10-Year Treasury Yield Rises to 4.987%" (Oct. 26, 2026); SEC Investor Bulletin "Interest Rate Risk: When Interest Rates Go Up, Prices of Fixed-Rate Bonds Fall" (Investor.gov).