VGUS vs VUSB

VGUSAVanguard Ultra-Short Treasury ETF

VUSBAVanguard Ultra-Short Bond ETF

In short

VGUS A one-ticker parking spot at the very front of the Treasury curve: about 90 bills and short notes, passively sampled, income paid monthly. Vanguard opened it in 2025 at 0.07%, under the typical Treasury fund in its peer group.

VUSB Vanguard's first actively managed bond ETF, run by its in-house fixed income team and priced at 0.10%. It holds investment-grade paper maturing inside two years: a step past a money fund, well short of a real bond fund.

Stated mandate

VGUS Vanguard says the fund seeks to track a market-weighted Treasury index with an ultra-short dollar-weighted average maturity. It uses passive index sampling and generally invests at least 80% of assets in securities in, or economically similar to, the index.

VUSB The fund seeks current income with limited price volatility while investing in diversified high- and medium-quality fixed-income securities. It expects to maintain a dollar-weighted average maturity of 0–2 years.

Why people hold it

• VGUS 0.07% a year against a 0.12% median for Treasury funds in its peer group. Fees bite hardest at the short end, where there is no duration cushion to hide them.
• Government paper only: roughly 90 US Treasuries sampled against the Bloomberg Short Treasury Index. No corporate credit, no mortgages, no derivatives overlay.
• Tracking has been tight since launch, and the mandate is plain: at least 80% in index securities or economic equivalents. What it says on the tin is what it holds.
• Pays monthly and slots into Vanguard's Treasury shelf next to VGIT and VTG, so you can move along the maturity ladder without leaving the lineup.

• VUSB At 0.10%, it costs half the typical ultra-short bond ETF and undercuts the other leaders in the group: SHV, PULS, FLDR and DUSB all charge 0.15%.
• Active, not adventurous. The managers buy investment-grade bonds (A3-or-better high quality plus BBB-tier medium quality) and hold average maturity to zero-to-two years.vanguard.com
• Income lands monthly, sourced from roughly 170 bonds, so no single issuer drives the outcome.
• A multi-billion-dollar fund that trades actively, and the same portfolio team also runs a similar Vanguard ultra-short fund.vanguard.com

Worth knowing

• VGUS Not the cheapest ticker on Vanguard's own bond shelf: VGIT and VTG run 0.03%. The ultra-short slice costs a few extra basis points.
• Ultra-short maturities mean income resets as short-term rates move, up or down. This is a cash-management tool, not a bet on falling yields.
• A 2025 launch, so the history is short and trading is moderate rather than heavy. Worth eyeing the spread on large orders in the first and last minutes of the day.

• VUSB This is not a money market fund. No fixed $1 share price, and the market price can trade above or below the value of the holdings.vanguard.com
• The mandate allows BBB-tier credit, a notch of risk a Treasury-only neighbor like SHV doesn't take.vanguard.com
• Bonds this short reprice with short-term rates, so the monthly payout drifts up and down instead of holding a set level.vanguard.com

Full VGUS profile⁠

Full VUSB profile⁠