FLDB vs XHLF

FLDBCFidelity Low Duration Bond ETF

XHLFABondBloxx Bloomberg Six Month Target Duration US Treasury ETF

In short

FLDB Fidelity's 2024-vintage cash-adjacent bond fund: roughly 300 short-maturity holdings measured against 6-to-9-month T-bills, with income paid monthly. A diversified credit mix where many category rivals hold Treasuries and little else.

XHLF Most cash-parking funds pick a maturity bucket. XHLF picks a number: it blends Treasury bills to an average duration of about six months, resets to that target monthly, and charges three basis points to do it.

Stated mandate

FLDB FLDB uses a diversified, low-duration bond strategy to pursue substantial current income while seeking to preserve capital.

XHLF The Fund seeks to track the investment results of an index composed of U.S. Treasury securities.

Why people hold it

• FLDB Spreads risk across roughly 300 short-maturity bonds rather than one Treasury sleeve, with the Bloomberg U.S. Treasury Bill: 6-9 Months Index as its yardstick.fidelity.com
• Pays monthly, matching a mandate written around substantial current income while seeking to preserve capital.fidelity.com
• Stays inside its stated low-duration remit instead of stretching maturities for extra yield, and has pulled in hundreds of millions since its 2024 debut.

• XHLF Costs 0.03% a year, against a typical short-Treasury peer near 0.14%. In cash-like funds, where returns come from bills everyone owns, fee is the main lever.
• Tracks an index built to hold an average duration of roughly six months, rebalanced monthly, so exposure stays anchored instead of drifting as bills mature.bondbloxxetf.com
• Sits in the gap between 0-3 month bill funds and one-year funds. Its sibling XONE targets a one-year duration at the same 0.03%, so the two can be mixed to dial in duration.
• US Treasury bills only, no credit bets hiding in the portfolio, run in a multi-billion-dollar fund that has stayed close to its index.

Worth knowing

• FLDB The 0.20% fee sits at the category median, and cheaper shelf-mates undercut it: VUSB at 0.10%, SHV, PULS and Fidelity's own FLDR at 0.15%.
• Thinly traded next to the ultrashort category's household names, which can mean wider bid-ask spreads on the way in and out.
• Launched February 2024, so its record is short and has not yet spanned a full rate cycle.

• XHLF Six months of duration is not zero. Prices move a touch more when yields shift than in 0-3 month bill funds such as BIL or CLIP.
• Income rides whatever Treasury bills happen to pay, and distributions arrive on an irregular rhythm rather than a fixed amount or schedule.
• Volume is moderate next to the largest bill ETFs, so spreads can be a bit wider, which matters more on big tickets than small ones.

Full FLDB profile⁠

Full XHLF profile⁠