iShares iBonds Dec 2035 Term Treasury ETF (IBTQ)

IBTQ is a passively managed exchange-traded fund issued by BlackRock through iShares. It holds US Treasury securities all maturing in December 2035, making it a term-maturity bond fund—one where the endpoint is fixed and transparent rather than perpetually drifting.

The index and what it contains

IBTQ tracks the Bloomberg US Treasury 2035 term maturity index. This index includes on-the-run and off-the-run Treasury notes and bonds maturing between December 15, 2035 and January 15, 2035. The narrow window ensures that all holdings in IBTQ reach maturity within a predictable timeframe. The index construction is straightforward: every Treasury security meeting the maturity criteria is included, weighted by market value. This means IBTQ holds dozens of individual CUSIP numbers, each representing a different Treasury issuance date or coupon rate, all converging on the same December 2035 maturity.

Duration mechanics and interest-rate sensitivity

As time passes, the bonds in IBTQ age toward their maturity date, and the fund’s average duration declines mechanically. A Treasury with 10 years to expiration exhibits substantial price sensitivity to interest-rate changes; one with 1 year remaining exhibits almost none. This duration decline is not accidental but inherent to the structure. An investor buying IBTQ can expect to see its price volatility decrease year by year, all else equal. When yields rise, IBTQ’s price falls further than a shorter-duration Treasury would, but less than a longer-duration fund. When yields fall, the reverse occurs. This makes IBTQ less volatile than traditional long-term bond funds but more volatile than short-term Treasury funds.

Interest-rate risk and the maturity endpoint

The principal risk in IBTQ is interest-rate movement. If yields climb after purchase, the value of IBTQ’s Treasury holdings declines, and the fund’s net asset value per share drops. An investor who buys IBTQ at low yields and watches rates rise will face a marked-to-market loss. However, that loss is unrealised; at the maturity date in December 2035, the Treasury securities inside the fund mature at par, and the full principal is returned. This is the trade-off of bond investing: interest-rate risk is real in the short term but irrelevant at maturity if you hold until the endpoint.

Reinvestment and coupon management

IBTQ’s Treasury holdings pay coupons throughout the year, and these payments are distributed quarterly to shareholders. Investors can take the coupons in cash or reinvest them. If coupons are reinvested and interest rates fall, the opportunity to reinvest at higher yields is lost. If rates rise, reinvestment becomes more attractive. The fund itself reinvests coupon proceeds into short-dated Treasuries or money-market instruments while awaiting the December 2035 maturity date. This reinvestment does not shield the fund from rate changes; it merely collects and manages cash mechanically.

Structure and costs

BlackRock sponsors IBTQ as a passive index fund. The fund holds actual Treasury securities, not derivative structures, so there is no counterparty risk. It trades on the Nasdaq intraday with high liquidity and tight bid-ask spreads. The expense ratio of approximately 5 basis points annually reflects the low cost of managing an index of government securities. Shares settle T+2 and are treated as fixed-income holdings by most brokers.

Who uses term-maturity Treasury ETFs

IBTQ serves investors building bond ladders—holding a series of term-maturity Treasury funds maturing in different years to create a predictable stream of principal repayments over time. It also appeals to investors uncomfortable with the perpetual duration management of conventional bond funds, preferring instead to lock in a known maturity date. For those planning for a specific liability or cash need in late 2035, IBTQ’s fixed endpoint offers planning clarity that traditional bond funds cannot provide.

To research IBTQ, review the BlackRock iShares prospectus and fact sheet, which detail the fund’s objective, holdings, and costs. The fact sheet shows the weighted average maturity, which descends toward zero as December 2035 approaches. The Bloomberg index methodology specifies which Treasuries qualify. Observing the Fed’s rate decisions and Treasury market yield movements reveals the forces acting on IBTQ’s price, though the fixed maturity date removes the perpetual uncertainty about when to exit the position.