BND vs BNDX vs AGG: Best Total Bond ETF for Your Portfolio

If you're comparing BND, BNDX, and AGG, here's the bottom line:

• BND provides broad exposure to high-quality U.S. bonds with low fees.
• AGG offers similar U.S. exposure but with higher liquidity, which may benefit active traders or those with large portfolios.
• BNDX provides international bond exposure with currency hedging, which adds international diversification beyond the U.S. market. When building your core holdings, it's also vital to consider tax-efficient ETF investing to help manage potential tax impacts on returns.

Key Highlights:

• Expense Ratios: BND and AGG are both cost-efficient at 0.03%, while BNDX is slightly higher at 0.07%—it's important to understand how expense ratios impact ETF returns over time.
• Yield: As of February 2026, BND leads with a 4.18% SEC yield, AGG follows at ~3.9%, and BNDX offers ~3.2%.
• Portfolio Fit: BND and AGG focus on U.S. bonds, but AGG includes more mortgage-backed securities, while BNDX adds global diversification.
• Risk: BND has higher Treasury exposure for stability; AGG balances Treasuries and MBS; BNDX spreads risk internationally but faces currency volatility.

Quick Comparison

Metric	BND	AGG	BNDX
Expense Ratio	0.03%	0.03%	0.07%
AUM	$151.45B	$91.68B	$76.29B
Yield (30-Day SEC)	4.18%	~3.9%	~3.2%
Focus	U.S. Bonds	U.S. Bonds	International Bonds
Liquidity	Moderate	High	Moderate

Choose based on your priorities: U.S. stability (BND), liquidity (AGG), or global exposure (BNDX).

BND vs. AGG - Which Total U.S. Bond Market Fund?

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Side-by-Side Metrics Comparison

Taking a closer look at the numbers behind these ETFs highlights the similarities between BND and AGG, while BNDX stands out with its distinct characteristics. Here's a summary of key metrics, followed by a deeper dive into the details.

Metric	BND	AGG	BNDX
Expense Ratio	0.03%	0.03%	0.07%
AUM	$151.45B	$91.68B	$76.29B
YTD Performance	1.12%	~1.1%	0.79%
Average Duration	~5.9 years	~6.3 years	N/A
10-Year Avg Return	1.35%	1.34%	N/A

Expense Ratios and Costs

When it comes to keeping costs low, BND and AGG excel with an annual expense ratio of just 0.03% - a stark contrast to the category average of 0.54%. This means these ETFs are about 94% cheaper than most of their peers. On the other hand, BNDX charges a slightly higher 0.07%, reflecting the added complexity of managing bonds across multiple currencies and international markets.

Performance and Returns

Over the long term, BND and AGG have delivered almost identical results, with 10-year average annual returns of 1.35% and 1.34%, respectively. Year-to-date (YTD) performance as of February 13, 2026, shows similar outcomes: BND returned 1.12%, while AGG came in at ~1.1%. BNDX, however, lagged slightly with a 0.79% return, reflecting the effects of varying international interest rate environments.

Another key difference lies in duration. AGG has an average duration of 6.3 years, slightly longer than BND’s 5.9 years, making it a bit more sensitive to interest rate changes.

Yield and Income Potential

For income-focused investors, BND offered a 30-day SEC yield of 4.11% as of October 17, 2025. While both BND and AGG concentrate on investment-grade U.S. bonds, BNDX brings something different to the table by providing exposure to non-U.S. bonds and currencies, adding another layer to income dynamics.

Additionally, AGG sees higher average daily trading volumes - $631.4 million compared to BND’s $433.3 million. This increased liquidity can result in narrower bid-ask spreads, which is a potential advantage for active traders.

Detailed ETF Analysis

BND: Vanguard Total Bond Market ETF

BND is a U.S. bond market ETF that tracks the Bloomberg U.S. Aggregate Float Adjusted Index. This index excludes bonds held by the Federal Reserve, which significantly affects its asset mix. As of December 31, 2025, the fund managed 11,444 bonds with total net assets of $384.8 billion.

This float-adjusted approach results in a U.S. Treasury allocation of 40%–50% of assets, compared to around 30% for most bond funds. Currently, 69.25% of BND's portfolio is allocated to U.S. Government securities, including Treasuries and Agency MBS, with 12.44% in BBB-rated bonds and 11.92% in A-rated bonds. Over 70% of its holdings are rated AAA or AA, exceeding the category average by about 10 percentage points.

"A razor-thin fee preserves the performance advantage for Vanguard Total Bond Market Index's expansive portfolio of US investment-grade bonds." – Lan Anh Tran, Analyst, Morningstar

BND has demonstrated resilience during market downturns, outperforming the category average by 6.84 percentage points during the 2008 financial crisis and by 2.13 percentage points during the March 2020 pandemic. Between its 2007 inception and May 2025, BND's exchange-traded share class outpaced its category average by 26 basis points annually. As of February 11, 2026, it offered a 30-day SEC yield of 4.18%.

With its higher Treasury weighting, BND provides stability during market turbulence, making it a solid core holding for cost-conscious, long-term investors. For those seeking global diversification, BNDX offers a compelling international alternative.

BNDX: Vanguard Total International Bond ETF

BNDX expands beyond U.S. borders, offering exposure to global investment-grade bonds. Unlike BND and AGG, which focus solely on the U.S., BNDX diversifies risk by including international government and corporate bonds. The fund also employs currency hedging to reduce volatility from exchange rate fluctuations.

Operating in various global interest rate environments, BNDX helps investors diversify beyond U.S. bonds and reduce home-country bias. Pairing BND or AGG with BNDX can create a balanced world bond portfolio, spreading credit risk across multiple regions. This international exposure complements U.S. holdings, adding international exposure that may perform differently than U.S. markets.

For those prioritizing liquidity alongside broad U.S. bond exposure, AGG offers another strong option.

AGG: iShares Core U.S. Aggregate Bond ETF

AGG tracks the Bloomberg U.S. Aggregate Bond Index, covering a wide range of U.S. investment-grade bonds, including Treasuries, government agency bonds, corporate bonds, and mortgage-backed securities. As of February 2026, the fund held 13,056 bonds.

Unlike BND, AGG uses a sampling methodology that includes bonds held by the Federal Reserve. This results in a higher allocation to agency mortgage-backed securities - typically 5 to 6 percentage points more than BND. AGG's standout feature is its high liquidity, which is especially beneficial for investors needing flexibility for portfolio rebalancing or tactical adjustments. Morningstar awarded AGG its Gold rating as of January 2026.

"The fund's limited credit risk should cushion downturns during credit shocks, but it will miss out when credit spreads tighten." – Lan Anh Tran, Analyst, Morningstar

AGG is a great choice for investors who prioritize liquidity and flexibility, serving as a reliable benchmark for the U.S. bond market. Its sampling approach offers a distinct complement to BND's float-adjusted methodology, making it a valuable addition to a diversified fixed-income strategy.

Risk Profiles and Portfolio Fit

Duration and Interest Rate Sensitivity

Duration measures how sensitive a fund is to changes in interest rates. As of December 31, 2025, BND has an average effective duration of 5.7 years. By comparison, AGG has a slightly shorter duration, differing by only a few months. This variation comes down to how their respective indexes are constructed: BND follows a float-adjusted index that excludes bonds held by the Federal Reserve. This exclusion increases its allocation to U.S. Treasuries while reducing its exposure to mortgage-backed securities (MBS).

Historically, this difference in duration has influenced performance during fluctuating interest rate periods. For instance, during the Taper Tantrum (2013–2015) and the 2022 market selloff, BND underperformed AGG because of its higher sensitivity to interest rate changes. However, when rates decline, BND often benefits from its heavier weighting in Treasuries. On the other hand, BNDX operates in global markets and uses currency hedging to manage the risks stemming from varying interest rate environments.

Metric	BND	AGG	BNDX
Average Duration	5.7 years	Slightly shorter than BND	Varies with international conditions
Primary Index	Bloomberg U.S. Agg Float Adjusted	Bloomberg U.S. Aggregate Bond	International bonds
Rate Sensitivity	Higher (more Treasuries)	Moderate (more MBS)	Depends on global market conditions

These duration and rate sensitivity differences also influence the overall credit and risk profiles of these ETFs, which are explored next.

Credit Quality and Default Risk

All three ETFs focus on investment-grade bonds, meaning they aim to minimize default risk. BND, in particular, leans heavily on U.S. government securities, which enhances its credit stability. In contrast, AGG allocates about 5–6% more of its portfolio to agency mortgage-backed securities due to differences in its index construction. While neither fund chases high returns by taking on additional credit risk, both serve as stabilizers within a portfolio.

"The primary purpose of a bond position within a portfolio is to diversify equity risk. When the equity market is in turmoil, bonds can serve as ballast."
– Neal Kosciulek, Manager Research Analyst, Morningstar

One example of this stabilizing role occurred during the March 2020 pandemic selloff. BND’s heavier allocation to Treasuries allowed it to outperform as investors flocked to safer assets. Similarly, BNDX maintains investment-grade quality while spreading credit risk across a variety of countries.

For investors seeking international exposure, managing currency volatility becomes a crucial consideration.

Currency Hedging and International Exposure

Adding to the discussion of duration and credit risk, BNDX introduces another layer of complexity: currency fluctuations. BNDX offers exposure to bonds denominated in foreign currencies but employs currency hedging to reduce the impact of exchange rate volatility. Without hedging, international bond funds can see currency swings overshadow their fixed-income returns.

"As currencies are more volatile than bonds, currency returns for a foreign currency bond can end up dwarfing its fixed-income return."
– Investopedia

Choosing the Right ETF for Your Portfolio

Key Factors to Consider

When deciding between BND, BNDX, and AGG, focus on factors like geographic exposure, credit quality, and your investment goals.

If you're looking for U.S. bond exposure, BND and AGG are strong options. BND leans heavily on AAA-rated bonds, with about 72% of its portfolio in this category, making it a safer choice for conservative investors who prioritize credit quality. On the other hand, AGG stands out for its liquidity and diversification, holding over 13,000 individual securities, with approximately 74% in AA-rated bonds. This makes AGG ideal for active traders or those placing large orders.

"With BND having a higher concentration of higher-rated bonds, it will be a less risky investment because it's tied to bonds that are less likely to default."
– Adé Hennis, Author, The Motley Fool

For those seeking international exposure, BNDX provides access to more than 6,600 non-U.S. bonds, coupled with currency hedging. This feature makes BNDX a valuable addition to portfolios already centered on U.S. bonds like BND or AGG, especially if you want to mitigate risks tied to the U.S. economy.

Yields across these ETFs are relatively close but still worth comparing. As of early 2026, BND has a 30-day SEC yield of 4.2%, AGG offers 3.9%, and BNDX delivers around 3.2%.

Understanding these distinctions is essential, but analyzing them efficiently can be challenging. That’s where a tool like Mezzi comes into play.

How Mezzi Can Help Optimize Your Decision

Once you've weighed the key factors, Mezzi can simplify the decision-making process by providing a clearer picture of how each ETF fits into your portfolio.

Analyzing ETF details - like duration, credit quality, and tax implications - requires digging into complex data. Mezzi’s AI-powered platform simplifies this by giving you a comprehensive view of all your accounts, showing how BND, BNDX, or AGG would impact your overall interest rate sensitivity and credit exposure.

The platform’s X-Ray tool is particularly helpful for uncovering overlaps in your holdings. For instance, if your portfolio already includes significant Treasury exposure, Mezzi can identify this and suggest whether AGG's heavier allocation to mortgage-backed securities could improve diversification.

Mezzi also shines in bond tax-loss harvesting and tax optimization. It actively monitors for wash sales across accounts, a tricky tax rule that can cost active investors thousands annually. Since BND and AGG track similar indexes, Mezzi ensures your tax-loss harvesting strategies avoid triggering unwanted tax consequences.

Lastly, Mezzi’s Financial Calculator lets you model how different bond allocations affect your long-term wealth. By factoring in yields, expense ratios, and fees, you can make informed choices about whether to prioritize BND’s slightly higher yield, AGG’s liquidity, or BNDX’s global exposure - all without needing an expensive financial advisor.

FAQs

Should I hold both BND and AGG, or just one?

Holding both BND and AGG might seem like a way to achieve broader diversification. However, since they have overlapping exposures and similar performance, many investors find that owning just one is enough. Opting for a single fund can streamline your portfolio and potentially lower costs, depending on what aligns best with your financial goals and personal preferences.

How much BNDX should I add for global diversification?

To add some global variety to your bond portfolio, think about allocating 10-20% to BNDX. This gives you exposure to international bonds, which can balance out U.S.-focused options like BND. Of course, tailor this allocation to fit your personal investment goals and how much risk you're comfortable with.

Where should I place these ETFs for better taxes (taxable vs IRA)?

Bond ETFs like BND, BNDX, and AGG are often better suited for tax-advantaged accounts, such as IRAs. Why? The interest income these funds generate is taxed at your full marginal rate in a taxable account. By holding them in an IRA, interest income may not be subject to current taxes, which could affect overall tax efficiency.

Related Blog Posts

• BND vs AGG: duration, credit quality, and historical behavior in rate cycles.
• BND vs AGG: 5-year total return, duration/credit profile, drawdowns during rate spikes.
• BND vs AGG vs IUSB vs SCHZ - Best core total bond ETF for diversified fixed income
• BNDX vs IAGG vs IGOV - Best international bond ETF (USD-hedged) for stability