IBCB vs IBDT

IBCBCiShares iBonds Dec 2036 Term Corporate ETF

IBDTAiShares iBonds Dec 2028 Term Corporate ETF

In short

IBCB A bond ladder rung with a date stamped on it: IBCB holds roughly 300 investment-grade corporate bonds that all come due in 2036, so the term ends when the bonds do.

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

IBCB The fund seeks to track an index of U.S.-dollar-denominated, investment-grade corporate bonds maturing in 2036.

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

• IBCB Every bond in the basket is slated to mature in 2036, giving the portfolio a defined end date instead of rolling on forever like a standard corporate bond fund.
• Charges 0.10% a year and spreads it across roughly 300 investment-grade corporate issues tracked by the Bloomberg December 2036 Maturity Corporate Index.
• Pays quarterly, and the index keeps the credit box to investment grade rather than reaching into junk for extra income.
• One rung in the wider iBonds shelf: nearer-dated siblings such as IBDU (2029) sit among the strongest names in this cohort, so whole ladders live in one family.

• 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

• IBCB It launched in 2026, so the live record is short and any read on its risk behavior rests on limited history.
• A 2036 maturity is a long rung. Prices move more with interest rates than short-dated funds like the 2028 and 2029 vintages do.
• The 0.10% fee matches the typical target-maturity bond fund rather than undercutting it (VBCB runs 0.08%), and this one trades moderately, so limit orders are standard practice.

• 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 IBCB profile⁠

Full IBDT profile⁠