What is the primary purpose of comparing ETF expense ratios like BIL and TBIL?

Expense ratios represent the annual cost of owning a fund, deducted from its assets. When comparing BIL (0.14%) and TBIL (0.15%), even a small difference can impact net returns over time. For investors, understanding these fees is crucial because higher costs reduce the amount of capital growing. This comparison highlights how fee structures differ, helping investors assess the cost-efficiency of similar ultrashort bond products without focusing on performance alone.

How do inception dates affect the evaluation of ETFs such as BIL and TBIL?

The inception date marks when a fund first began trading, providing a measure of its operational history. BIL, launched in May 2007, offers a long track record, which can signal stability and proven management processes. In contrast, TBIL, launched in August 2022, has a much shorter history. Investors often weigh this difference because newer funds may lack extensive data on how they handle various market conditions, though both serve similar short-term liquidity needs.

What does net asset size imply for ETFs like BIL and TBIL?

Net assets indicate the total market value of the fund's holdings. BIL, with $48.1 billion, suggests high liquidity and potentially tighter trading spreads due to substantial investor interest. TBIL, with $7.3 billion, is still significant but smaller. Larger funds often benefit from economies of scale, potentially keeping costs lower and ensuring easier entry and exit for traders. However, size alone does not guarantee better performance or safety.

How do the expense ratios of BIL and TBIL compare directly?

BIL charges an expense ratio of 0.14%, while TBIL charges 0.15%. This means BIL is marginally cheaper by 0.01 percentage points. While this difference appears small, it compounds over years of ownership. For conservative investors prioritising cost minimisation, such slight variations matter. Both fees are low compared to actively managed funds, reflecting their passive strategy of holding ultra-short-term Treasury bills, where trading costs and management overheads are inherently limited.

What type of market exposure do BIL and TBIL provide?

Both ETFs focus on ultrashort-term government debt. BIL tracks Treasury bills with maturities between one and three months, while TBIL specifically targets three-month Treasury bills. This short duration minimises interest rate risk, meaning their prices remain relatively stable compared to longer-term bonds. They are typically used for cash management, offering a place to park funds with lower volatility than equities or long-duration bonds, suitable for investors seeking preservation of capital.

How similar are the top holdings of BIL and TBIL?

Based on available data, there is no overlap among the top-10 holdings of BIL and TBIL. This is unusual for two funds with similar objectives, suggesting different selection methodologies or timing in portfolio construction. While both hold Treasury bills, the specific instruments chosen differ. Investors should note that despite the lack of shared top holdings, the overall risk profile and return potential of both funds remain closely aligned due to their focus on ultra-short-term government debt.

Which investing goals are typically associated with these ETFs?

These ETFs are often associated with goals requiring high liquidity and capital preservation. Investors use them to hold cash reserves, manage working capital, or reduce portfolio volatility during uncertain market periods. Because they invest in ultra-short-term government debt, they aim to provide stable returns with minimal price fluctuation. They are not typically used for long-term growth or high yield generation, but rather as defensive tools to protect principal while earning modest interest.

How do dividend yields compare between BIL and TBIL?

BIL offers a dividend yield of 3.71%, slightly higher than TBIL's 3.65%. For income-focused investors, this 0.06% difference is marginal. Both yields reflect the current short-term interest rates on Treasury bills. Since these funds distribute interest earned from their holdings, the yields serve as a proxy for short-term cash returns. The higher yield of BIL may stem from its larger asset base and different holding structure, though both track similar market segments.

Why is transparency on index tracking limited for these funds?

For both BIL and TBIL, the specific index tracked is not available in the provided data. This limits the ability to assess the exact methodology used to select securities. While BIL references the Bloomberg 1-3 Month T-Bill Index in its name, detailed methodology remains opaque. Similarly, TBIL's tracking index is unspecified. Investors relying on index replication must accept this gap, though the funds' focus on Treasury bills generally implies a low-risk, standardized approach to security selection.

What should investors consider regarding issuer reputation for TBIL?

BIL is issued by SPDR, a well-known entity with a long operational history. In contrast, the issuer identity for TBIL is not available in the provided data. This lack of transparency can make it difficult to assess the sponsor's reputation, financial stability, or operational reliability. Investors often value established issuers for their proven management practices and regulatory compliance, making the opaque issuer information for TBIL a notable point for due diligence.

How do these funds handle distributions to investors?

As ETFs holding Treasury bills, both BIL and TBIL typically distribute interest income regularly to investors. These distributions reflect the coupon payments and maturity gains from the underlying short-term government securities. Investors should expect these payouts to fluctuate slightly with prevailing interest rates. Understanding the distribution frequency and tax implications is important, as these funds are designed to provide steady cash flow rather than capital appreciation, aligning with their role as cash management vehicles.

What is the educational disclaimer for this comparison?

This information is for educational purposes only and does not constitute financial advice. The data presented regarding BIL and TBIL, including expense ratios, yields, and assets, comes from public sources as of 2026-09-22 and may change over time. Investors should consult with a qualified financial adviser before making investment decisions. Past performance is not indicative of future results, and all investments carry risks, including the potential loss of principal.

BIL vs TBIL

Two funds, one decision: we compare cost, performance and what each ETF actually holds in September 2026.

Compare BIL (SPDR Bloomberg 1-3 Month T-Bill ETF) and TBIL (RBB Treasury 3 Month Bill ETF). This page examines their expense ratios of 0.14% and 0.15%, dividend yields, shared holdings, and how each fund tracks its market. Both offer ultrashort bond exposure with distinct inception dates and net assets. Educational content, not financial advice.

Fund Snapshot

Key Fund Metrics

BIL

Metric

TBIL

0.14%

Expense Ratio

0.15%

3.71%

Dividend Yield

3.65%

$48.14B

Net Assets

$7.35B

Holdings

May 25, 2007

Inception Date

Aug 9, 2022

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Index Tracked

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Ultrashort Bond

Fund Category

Ultrashort Bond

BIL costs about $1.00 less per year for every $10,000 invested.

Shared Top Holdings

These funds do not share any of their top holdings.

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BIL vs SHV

Compare BIL and SHV ETFs. Review 0.14% and 0.15% expense ratios, 3.71% and 3.70% yields, assets, inception dates and tracking details in this factual guide.

SGOV vs TBIL

Compare SGOV and TBIL ETFs. Review expense ratios, net assets, and dividend yields. Note tracking index and top holdings are not available for both funds.

Investment Analysis

BIL

Pros

Substantial assets of $48.1 billion support deep liquidity and efficient trading.
Long inception history since May 2007 provides extensive operational track record.
Expense ratio of 0.14 per cent is marginally lower than the comparator fund.

Considerations

Top holdings and sector weights are not available for detailed concentration analysis.
Index tracked is not available, limiting transparency on specific methodology details.
Yield of 3.71 per cent is only modestly higher than the alternative fund.

TBIL

Pros

Short duration exposure focuses on Treasury 3-month bills, minimising interest rate risk.
Dividend yield of 3.65 per cent offers competitive cash flow for conservative investors.
Assets of $7.3 billion indicate sufficient scale for typical retail trading needs.

Considerations

Inception in August 2022 means a shorter operational history than the comparator.
Expense ratio of 0.15 per cent is slightly higher than the larger rival fund.
Issuer identity is not available, preventing assessment of sponsor reputation and stability.

About BIL and TBIL

BIL (BIL)

The SPDR Bloomberg 1-3 Month T-Bill ETF (BIL) is an ultra-short bond exchange-traded fund designed to track the performance of U.S. Treasury bills with maturities between one and three months. Managed by State Street Global Advisors, this fund offers investors a way to hold high-quality, short-term government debt. With an expense ratio of 0.14% and net assets exceeding USD 48 billion, it provides significant liquidity for those looking to park cash or reduce portfolio risk. BIL typically distributes interest payments derived from its underlying holdings, currently yielding around 3.71%. While generally considered low-risk compared to longer-duration bonds, it is not guaranteed and its value can fluctuate. Investors should be aware that returns may vary based on interest rate movements and economic conditions, making it suitable for those seeking potential income with lower volatility.

TBIL (TBIL)

The RBB Treasury 3 Month Bill ETF (ticker: TBIL) offers investors exposure to ultra-short-term United States Treasury bills. Designed with a focus on capital preservation and liquidity, this fund invests primarily in government-backed debt securities with maturities of three months or less. With a low expense ratio of 0.15% and a current dividend yield of 3.65%, it provides a straightforward way to hold cash equivalents within an investment portfolio. Since its inception in August 2022, the fund has grown to manage net assets of approximately USD 7.35 billion, holding just seven positions for maximum simplicity. While Treasury bills are generally considered lower risk than equities or long-duration bonds, they are not immune to fluctuation. The fund's value can rise and fall, and past performance does not guarantee future results. It serves as a potential option for those seeking stability and modest income.

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BIL vs TBIL

Fund Snapshot