Investors looking for a conservative, high-liquidity place to park their cash often end up asking the same essential question: What is VUSXX? Officially known as the Vanguard Treasury Money Market Fund (Investor Shares), VUSXX is a low-risk investment vehicle designed for income preservation.
It caters to individuals and institutions seeking capital stability, daily access to funds, and exposure only to U.S. Treasury obligations.
With interest rates still elevated in 2025 and market volatility shaping cash allocation decisions, VUSXX has become a key tool for safeguarding capital while earning a modest yield.
What Is VUSXX?
VUSXX is a Treasury-only money market mutual fund managed by Vanguard. It invests exclusively in U.S. Treasury bills, notes, and repurchase agreements that are fully collateralized by U.S. Treasury securities. This strict investment discipline ensures that the fund carries virtually no credit risk.
The primary objective of VUSXX is to provide current income while maintaining a stable net asset value (NAV) of $1.00 per share. Investors can access funds on a daily basis, making it a popular choice for both emergency reserves and temporary cash holdings.
Learn more directly from Vanguard’s official VUSXX fund page.
How VUSXX Works
Money deposited into VUSXX is pooled with other investors’ assets and allocated into a diversified basket of short-term U.S. government obligations. The portfolio is actively managed to ensure high credit quality, liquidity, and compliance with SEC Rule 2a-7, which governs money market funds.
The fund earns income from the interest on Treasury instruments. This income is distributed to investors daily and compounded monthly. The share price remains stable at $1.00, with returns passed along as yield rather than capital gains.
In addition to traditional Treasury bills, VUSXX may use overnight repurchase agreements, where counterparties temporarily sell Treasury securities to Vanguard and agree to repurchase them shortly after. These agreements are fully collateralized, making them a safe tool to enhance yield without taking on additional risk.
How Safe Is VUSXX?
Safety is VUSXX’s defining feature. Because the fund invests exclusively in U.S. Treasury obligations, its holdings are backed by the full faith and credit of the United States government. This puts VUSXX among the most conservative investment options available in the market.
Key safety features include:
- Zero exposure to corporate or agency debt
- SEC Rule 2a-7 compliance for credit quality and liquidity
- No leverage, derivatives, or high-yield instruments
- Daily mark-to-market valuation to ensure pricing integrity
However, even safe doesn’t mean risk-free. VUSXX is not FDIC insured, and rising interest rates can impact the fund’s yield trajectory. Still, the risk of capital loss remains extremely low.
VUSXX Yield in 2025
As of Q2 2025, the 7-day SEC yield for VUSXX is approximately 4.94%, a reflection of current short-term Treasury rates and repo market dynamics.
This yield is competitive when compared to high-yield savings accounts and even some certificates of deposit (CDs), while offering much greater liquidity and no penalties for withdrawals. The yield is variable and adjusts in real time with changes in Federal Reserve policy.
You can track current yields directly from the Vanguard Money Market Fund page.
Key Facts About the Vanguard Treasury Money Market Fund
| Attribute | Details |
|---|---|
| Ticker | VUSXX |
| Fund Type | Treasury Money Market Fund |
| Issuer | Vanguard |
| Investment Strategy | U.S. Treasuries and collateralized repos |
| 7-Day SEC Yield (May 2025) | 4.94% |
| Expense Ratio | 0.09% |
| Minimum Investment | $3,000 |
| Net Asset Value (NAV) | $1.00/share |
| Liquidity | Daily access, no penalties |
| Tax Treatment | Exempt from state taxes in most states |
State Tax Advantages
A powerful benefit of VUSXX is its state tax exemption. Since its interest income comes from U.S. Treasury securities, many states do not tax this income, offering a real after-tax return boost for residents of high-income tax states like California, New Jersey, or New York.
Learn more at the IRS Treasury Income Guidelines.
This differentiates VUSXX from other money market funds like VMFXX, which includes repos and agency debt that often do not qualify for state tax exemption.
Who Should Consider VUSXX?
VUSXX is ideal for:
- Conservative investors looking to preserve capital
- Retirees managing withdrawals or keeping cash reserves
- Professionals setting aside money for tax payments or business liquidity
- Households saving for short-term goals such as a down payment or vacation
- Institutional investors parking operational cash with minimal risk
Its utility extends beyond emergency funds—it can also serve as a strategic asset during periods of market uncertainty.
For more comparison, read our related article: VUSXX vs VMFXX – Which Money Market Fund Is Right for You?
How to Invest in VUSXX
Investors can buy VUSXX directly through Vanguard, or via most major brokerage accounts that offer access to mutual funds.
Keep in mind:
- The minimum investment is $3,000
- Funds are generally available next business day
- No transaction fees when purchased through Vanguard directly
Be sure to check with your brokerage firm for platform-specific requirements or fees.
Morningstar View on VUSXX
As of 2025, Morningstar continues to regard VUSXX as a top-tier option among government money market funds, citing:
- Exceptional credit quality
- Longstanding reputation for safety
- Strong liquidity management practices
Morningstar ratings may fluctuate, so it’s wise to consult Morningstar’s VUSXX Profile for the most recent evaluation.
Reddit and Investor Community Sentiment
VUSXX has gained visibility across online finance communities, particularly in subreddits like r/Bogleheads and r/personalfinance. Common discussion points include:
- How VUSXX compares to online savings accounts
- Whether to hold VUSXX in taxable vs retirement accounts
- Its performance vs other Vanguard cash vehicles like VMFXX or settlement funds
While sentiment is largely positive, investors should always weigh community opinions against their individual financial goals.
VUSXX vs Alternatives
If you’re comparing VUSXX to other parking options, here’s a high-level breakdown:
| Option | Yield (May 2025) | Liquidity | State Tax Benefits | Risk Level |
| VUSXX | 4.94% | High (1-day) | Yes (most states) | Very Low |
| VMFXX | 5.03% | High (1-day) | No | Very Low |
| High-Yield Savings | 4.25% – 4.80% | Very High | No | Very Low |
| 1-Year CD | 4.75% – 5.00% | Locked-in | No | Low |
| Brokered CDs | 5.00%+ | Moderate | No | Low |
VUSXX may not always deliver the highest nominal yield, but its after-tax yield, stability, and simplicity make it highly appealing.
Final Word on VUSXX in 2025
VUSXX continues to be one of the most trusted names in capital preservation. Its strict adherence to U.S. Treasury instruments, low expenses, and Vanguard’s stewardship combine to deliver a conservative yet rewarding place to hold short-term cash.
Investors should keep an eye on rate trends and tax advantages when deciding how much to allocate. For those who value liquidity and peace of mind, VUSXX remains a solid, well-structured fund.
Disclaimer:
VUSXX.com is an independent publisher of financial education and insights. We are not affiliated with Vanguard or any of its investment products. This article is for informational purposes only and should not be considered financial or tax advice. Always consult with a licensed professional before making any investment decision.
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