TBUX vs VBIL

TBUXBT. Rowe Price Ultra Short-Term Bond ETF

VBILAVanguard 0-3 Month Treasury Bill ETF

In short

TBUX An actively run cash-plus bond fund that reaches past T-bills into corporate and securitized credit, while the prospectus keeps average effective maturity on a 1.5-year leash. Costs 0.17% and pays monthly.

VBIL Vanguard's cash-parking ETF: roughly two dozen Treasury bills, none maturing more than three months out, at 0.06% a year. It landed in 2025 and undercut most of the T-bill shelf on price.

Stated mandate

TBUX The fund seeks a high level of income consistent with low volatility of principal value. It invests in a diversified portfolio of shorter-term investment-grade corporate and government securities.

VBIL VBIL seeks to track the performance of a market-weighted Treasury index with an ultra-short-term dollar-weighted average maturity, using a passive approach designed to follow the Bloomberg U.S. Treasury Bills 0-3 Months Index.

Why people hold it

• TBUX At 0.17%, it charges less than the typical ultrashort bond ETF, which matters in a corner of the market where the whole return comes from short-maturity yield.
• The active mandate roams investment-grade corporates, asset-backed paper, bank obligations and mortgage bonds rather than tracking one narrow slice of the short end.troweprice.com
• Prospectus holds dollar-weighted average effective maturity to 1.5 years or less, so rate sensitivity stays short even though an individual bond can run out to five years.troweprice.com
• Income lands monthly, and the fund has grown past the billion-dollar mark into one of the stronger builds in its ultrashort peer group.

• VBIL It charges 0.06% a year, well under the 0.14% median for 0-1 year Treasury funds and under the category veteran, BIL.
• Plain passive mandate on the Bloomberg U.S. Treasury Bills 0-3 Months Index, tracked very closely. One of the tightest implementations in its peer group.vanguard.com
• Roughly two dozen bills backed by the US Treasury, every one maturing inside three months. Interest goes out monthly.
• A multi-billion-dollar fund with active daily trading, which tends to keep bid-ask costs small.

Worth knowing

• TBUX Index-run rivals cost less: VUSB at 0.10%, SHV at 0.15%. The gap is what an active manager picking the paper costs you.
• Corporate and securitized holdings carry credit risk a Treasury-only fund skips. Everything is investment grade at purchase, but a later downgrade does not force a sale.troweprice.com
• Trading is moderate rather than heavy, so spreads can run wider than the category's busiest names when markets get choppy.

• VBIL The payout floats with short-term rates. Monthly income rises and falls with what bills yield, and nothing about it is fixed.
• It opened in 2025, so its live record is short next to T-bill funds that have been running for years.
• Stretching maturity gets cheaper: peer XONE targets one-year duration at 0.03%, trading lower cost for more rate sensitivity.

Full TBUX profile⁠

Full VBIL profile⁠