Key Takeaways
- Invests mainly in U.S. Treasury securities.
- Maintains stable $1 net asset value.
- Offers high liquidity with low credit risk.
What is United States Treasury Money Mutual Funds?
United States Treasury Money Mutual Funds are specialized money market mutual funds that invest primarily in U.S. Treasury securities, such as Treasury bills, notes, bonds, and repos backed by these government obligations. These funds aim to provide investors with low risk, high liquidity, and a stable net asset value (NAV), typically maintaining a $1 per share value.
They are considered a safe haven investment due to their backing by the full faith and credit of the U.S. government and are regulated under SEC Rule 2a-7 to ensure quality and liquidity standards.
Key Characteristics
United States Treasury Money Mutual Funds are defined by their strict focus on U.S. government securities and short-term maturity profiles. Key features include:
- High Quality Holdings: At least 99.5% of assets are in cash, U.S. Treasury securities, or repos fully collateralized by Treasuries.
- Stable Net Asset Value: Maintains a stable NAV of $1 via amortized cost accounting, differing from fluctuating values in stock or bond funds.
- Liquidity: Shares are redeemable daily, providing cash-like access to your funds with minimal risk.
- Short-Term Maturity: Investments typically have maturities under 397 days, with at least 50% in weekly liquid assets such as Treasury bills.
- Regulatory Oversight: Governed by SEC rules to limit credit risk and ensure fund stability.
- Interest Income: Yields reflect short-term interest rates and are distributed as dividends, taxable unless otherwise specified.
- Use of Repos: May include repurchase agreements collateralized by Treasuries to slightly boost yields while maintaining low credit risk.
How It Works
These funds pool investors' money to purchase a diversified portfolio of U.S. Treasury securities and related instruments, ensuring safety and liquidity. The fund manager maintains strict asset allocation rules, investing predominantly in instruments with face value stability and short maturities to reduce interest rate risk.
Income is generated from interest payments on Treasury securities, which are bought at a discount and mature at face value, and from repos. This income is credited to investors as dividends, while the fund’s NAV remains stable at $1 per share. Unlike other mutual funds, Treasury money market funds do not fluctuate in value daily, making them suitable for conservative investors seeking capital preservation and liquidity.
Examples and Use Cases
United States Treasury Money Mutual Funds serve as an effective tool for investors seeking a low-risk, liquid alternative to savings accounts or short-term deposits. Common use cases include:
- Cash Management: Investors park cash in Treasury money funds to preserve capital while earning competitive yields compared to traditional bank accounts.
- Short-Term Investment: Ideal for holding funds temporarily during market volatility or before deploying capital to other low-cost index funds.
- Institutional Use: Corporations and financial institutions often use these funds for managing operational cash balances.
- Benchmark Example: Vanguard’s Federal Money Market Fund invests almost exclusively in Treasury bills and repos, illustrating the typical asset mix and yield profile in this category.
For a broader perspective on fixed-income options, see our guide on the best bond ETFs.
Important Considerations
While United States Treasury Money Mutual Funds offer exceptional safety and liquidity, they are not without caveats. Yields can fluctuate with short-term interest rates, so returns may decline if rates fall. Additionally, these funds are not FDIC insured, although the credit risk is minimal due to government backing.
It's important to understand that these funds do not guarantee principal but aim to maintain a stable NAV through rigorous regulatory compliance and high-quality asset holdings. For investors prioritizing capital preservation and immediate access to cash, these funds provide an attractive alternative within a diversified portfolio, alongside longer-term investments such as Bond ETFs and other fixed income vehicles.
Final Words
United States Treasury Money Mutual Funds offer a low-risk, highly liquid option for preserving capital while earning modest returns tied to short-term Treasury yields. To optimize your portfolio, compare yields and fees across funds to find the best fit for your cash management needs.
Frequently Asked Questions
A United States Treasury Money Mutual Fund is a type of money market mutual fund that invests primarily in U.S. Treasury securities like bills, notes, bonds, and related instruments. It aims to provide low risk, high liquidity, and a stable net asset value of $1 per share.
These funds use SEC-regulated valuation methods, specifically amortized cost accounting under Rule 2a-7, to keep the NAV stable at $1 per share. This differs from stock or bond funds whose NAV fluctuates daily.
They invest at least 99.5% of assets in cash, U.S. Treasury securities, and repurchase agreements fully collateralized by Treasuries, with at least 80% directly in Treasuries or related repos. At least 50% must be in highly liquid short-term Treasury bills.
Yes, these funds are among the safest money market options because they invest in U.S. government-backed securities, which have minimal credit risk due to the full faith and credit of the U.S. Treasury. However, they are not FDIC insured.
Investors earn dividends from the interest generated by Treasury securities and repurchase agreements. These dividends reflect current short-term interest rates and are typically taxable unless otherwise specified.
Yes, shares in these funds are redeemable daily at the stable $1 NAV, providing high liquidity and easy access to your cash without principal loss under normal market conditions.
Treasury money market funds are the safest category because they invest almost exclusively in U.S. Treasuries, unlike other money market funds that might include corporate or municipal debt, which carry higher risk.
Yields depend on short-term interest rates, but in high-rate environments, these funds can offer yields above 5%, often outperforming traditional savings accounts while preserving capital.

