Understand any stock in simple English
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It is a fund that holds long-term U.S. government bonds, giving investors a simple way to own them and collect their interest.
The iShares 20+ Year Treasury Bond ETF is a basket of very long-dated loans to the U.S. government, wrapped up so you can buy and sell it like a single stock. When you own a share, you own a tiny slice of a collection of Treasury bonds that don't mature for at least 20 years. The government pays interest on those bonds twice a year, and the fund passes that income along to its investors, usually as a monthly payout. People buy it for two main reasons: to collect that steady interest and to make a bet on where long-term interest rates are heading.
To understand why anyone gets excited about such a boring-sounding thing, you have to grasp how bond prices and interest rates move in opposite directions. If you own a bond that pays a fixed rate and new bonds start paying more, your old bond looks less attractive, so its price falls. Long-term bonds are far more sensitive to this than short ones, which is what makes this fund so lively. When rates fall, the value of its bonds can jump sharply; when rates rise, it can fall just as hard. That swing potential is exactly why traders reach for it. The fund is run by iShares, the giant exchange-traded fund arm of BlackRock, and it is one of the most heavily traded bond funds in the world. It is a go-to tool for big institutions and regular investors alike because it is cheap, easy to trade all day, and deeply liquid. Its main rivals are other long-bond funds such as the Vanguard Extended Duration Treasury ETF, which tracks a similar idea. The fund charges a small annual fee, and that fee is a real reason its returns fall a bit short of simply holding the bonds directly.
In 2002, BlackRock created a fund with one plain job: own U.S. government bonds that don't come due for at least 20 years. It was a simple idea — give people a way to park money in long-term Treasuries in one trade, with the fund aiming to match an index of those bonds. What few people focused on was how jumpy those long bonds are. A bond that pays you for decades barely moves when rates wiggle a little, but when rates move a lot, its price swings hard. That trait would sit quietly inside the fund for years before becoming the whole story.
When Covid hit in 2020, the Fed slashed interest rates to near zero to keep the economy alive, and long Treasuries soared. The fund hit its peak — and then it stopped being a safe place to hide. Long bonds behave like a giant lever on interest rates, so when rates turned, the fund turned with them, hard. From that 2020 high it has lost more than half its value, and its roughly 15-year duration means it acts as a bet on where rates go, not a place to keep your money safe.
Starting in 2022, the Fed began raising rates aggressively, and bonds issued years earlier with tiny coupons suddenly looked terrible — a perfect storm for generational losses in fixed income. Anyone who bought at the 2020 top lost over half their principal, and the fund became the textbook example of duration risk. Here is the strange part: even as its price was cut in half, its assets roughly doubled to $39 billion, because investors kept buying the dip.
Then, in the second half of 2023, the fund did something odd for a 21-year-old product: it rallied at a record pace and became an overnight sensation. Before long it held more than $50 billion, money flowed in during 18 of the past 20 months, and it ranked among the most-searched ETF tickers on the web. That popularity would soon meet a sharp price drop — but the crowds were not done yet.
From July through mid-October 2026, investors poured about $12 billion into the fund, including a record month in August — while the fund kept falling. The lure was a yield near 5.4%, income long Treasury holders hadn't collected in roughly two decades. At about $47 billion in assets, it remains the standard vehicle for long-duration government debt.
On September 23, 2026, the fund fell 1.6% to $80.46 a share, a record low, after strong U.S. economic data sparked a selloff in government bonds. Investors now expected the Fed to tighten further, after raising overnight borrowing costs for the first time since 2023. Between rate hikes, sticky inflation and worries about swelling debt issuance, the fund has lost more than half its value since its 2020 peak — a product built to track long bonds, turned into the market's favorite way to bet on rates, and the clearest cautionary tale in fixed income.
The honest catch is that this is not a "safe" stash of cash. Over the past few years, as the Federal Reserve pushed interest rates up to fight inflation, long-term bond prices fell hard, and this fund lost a lot of value. It is a powerful tool for a specific job — earning long-term government interest or betting on rate moves — but its very sensitivity cuts both ways.
Saved answer · last researched 6 Nov 2026
44% of big money managers are betting against bonds like TLT
In a May survey of global fund managers, 44% said they held less in bonds than their benchmarks call for, the biggest such bet against the asset class since June 2022. TLT makes money by holding long-term U.S. government bonds and passing along their interest, so its fate rides on demand for those bonds. When big investors sour on them, prices fall. Source: Bank of America Fund Manager Survey, reported by GuruFocus, data from 2026