IBDS vs IBDT

IBDSAiShares iBonds Dec 2027 Term Corporate ETF

IBDTAiShares iBonds Dec 2028 Term Corporate ETF

In short

IBDS A bond fund with an expiration date. IBDS holds a basket of investment-grade corporate bonds that all mature in 2027, pays monthly along the way, then winds up around December 15, 2027 and returns remaining assets to shareholders.

IBDT Acts more like a bond than a bond fund: roughly 700 investment-grade corporate bonds that all mature in 2028, wrapped in one ticker with a defined end date. Built for ladder rungs, monthly distributions and a known finish line.

Stated mandate

IBDS The fund seeks to track an index of U.S. dollar-denominated, investment-grade corporate bonds maturing in 2027. It is a term fund that winds up around December 15, 2027, distributing its remaining assets to shareholders.

IBDT The fund seeks to track an index of investment-grade corporate bonds maturing in 2028 and is designed to support income generation, bond-ladder construction, and interest-rate-risk management through a defined maturity.

Why people hold it

• IBDS Acts like a single bond rather than a perpetual fund: the wind-up date (around December 15, 2027) and the final distribution of remaining assets are written into the fund's own documents.
• Diversification hard to build by hand: about 700 dollar-denominated investment-grade corporate bonds in one ticker, tracking the Bloomberg December 2027 Maturity Corporate Index.ishares.com
• 0.10% a year, in line with the median target-maturity bond fund, from a lineup that has been running these dated rungs since well before this one launched in 2017.
• A multi-billion-dollar fund that trades actively and pays monthly, so the ladder rung stays liquid instead of locking you in until maturity.

• IBDT The defined 2028 maturity does the work: one ticker behaves like a ladder rung, no hunting down individual bonds or tracking each one's maturity.ishares.com
• About 700 investment-grade corporate bonds inside, so no single issuer carries the outcome the way it would in a handful of hand-picked bonds.
• Costs 0.10% a year, right at the typical fee for target-maturity bond funds, and it is one of the more actively traded names in that group.
• Launched in 2018 and now a multi-billion-dollar fund, it ranks among the strongest implementations in the target-maturity bond group.

Worth knowing

• IBDS Corporate credit, not Treasuries. Issuers can be downgraded or default, and the payout at wind-up isn't fixed the way a single bond's par value is.
• Short runway. As 2027 nears, the holdings mature into cash-like assets, so the fund behaves less and less like a bond fund and more like a countdown.
• Fee is mid-pack, not low: some target-maturity rungs undercut it, including VBCB at 0.08% and IBTJ at 0.07%.

• IBDT Vanguard's VBCB targets the same 2028 corporate maturity for 0.08%, two basis points cheaper.
• This is corporate credit, not Treasuries. The bonds are investment grade, but downgrades and defaults are still part of the picture.
• It has a finish line. When the 2028 term ends the strategy is over, so the what-next decision lands back with you.ishares.com

Full IBDS profile⁠

Full IBDT profile⁠