BYLD vs. AGG

Last updated Apr 2, 2026

Compare and contrast key facts about iShares Yield Optimized Bond ETF (BYLD) and iShares Core U.S. Aggregate Bond ETF (AGG).

BYLD and AGG are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. BYLD is a passively managed fund by iShares that tracks the performance of the Morningstar U.S. Bond Market Yield-Optimized Index. It was launched on Apr 22, 2014. AGG is a passively managed fund by iShares that tracks the performance of the Bloomberg U.S. Aggregate Bond Index. It was launched on Sep 22, 2003. Both BYLD and AGG are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

BYLD vs. AGG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Yield Optimized Bond ETF (BYLD) and iShares Core U.S. Aggregate Bond ETF (AGG). The values are adjusted to include any dividend payments, if applicable.

BYLD vs. AGG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BYLD iShares Yield Optimized Bond ETF	0.02%	8.41%	4.17%	8.30%	-10.33%	-1.25%	4.25%	12.79%	-1.50%	4.75%
AGG iShares Core U.S. Aggregate Bond ETF	0.09%	7.19%	1.31%	5.65%	-13.02%	-1.77%	7.48%	8.46%	0.09%	3.55%

Returns By Period

In the year-to-date period, BYLD achieves a 0.02% return, which is significantly lower than AGG's 0.09% return. Over the past 10 years, BYLD has outperformed AGG with an annualized return of 3.03%, while AGG has yielded a comparatively lower 1.66% annualized return.

BYLD

• 1D: 0.22%
• 1M: -1.20%
• YTD: 0.02%
• 6M: 1.02%
• 1Y: 5.97%
• 3Y*: 6.12%
• 5Y*: 2.20%
• 10Y*: 3.03%

AGG

• 1D: 0.07%
• 1M: -1.33%
• YTD: 0.09%
• 6M: 0.78%
• 1Y: 4.05%
• 3Y*: 3.62%
• 5Y*: 0.24%
• 10Y*: 1.66%

*Multi-year figures are annualized to reflect compound growth (CAGR)

BYLD vs. AGG - Expense Ratio Comparison

BYLD has a 0.17% expense ratio, which is higher than AGG's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

BYLD

iShares Yield Optimized Bond ETF

AGG

iShares Core U.S. Aggregate Bond ETF

Return for Risk

BYLD vs. AGG — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

BYLD

BYLD Risk / Return Rank: 72
BYLD Sharpe Ratio Rank: 71
BYLD Sortino Ratio Rank: 70
BYLD Omega Ratio Rank: 67
BYLD Calmar Ratio Rank: 79
BYLD Martin Ratio Rank: 75

AGG

AGG Risk / Return Rank: 50
AGG Sharpe Ratio Rank: 49
AGG Sortino Ratio Rank: 46
AGG Omega Ratio Rank: 40
AGG Calmar Ratio Rank: 67
AGG Martin Ratio Rank: 49

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

BYLD vs. AGG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Yield Optimized Bond ETF (BYLD) and iShares Core U.S. Aggregate Bond ETF (AGG). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

	BYLD	AGG	Difference
Sharpe ratio Return per unit of total volatility	1.30	0.93	+0.37
Sortino ratio Return per unit of downside risk	1.83	1.32	+0.51
Omega ratio Gain probability vs. loss probability	1.26	1.17	+0.09
Calmar ratio Return relative to maximum drawdown	2.28	1.76	+0.52
Martin ratio Return relative to average drawdown	8.29	4.89	+3.40
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BYLD vs. AGG - Sharpe Ratio Comparison

The current BYLD Sharpe Ratio is 1.30, which is higher than the AGG Sharpe Ratio of 0.93. The chart below compares the historical Sharpe Ratios of BYLD and AGG, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	BYLD	AGG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.30	0.93	+0.37
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.43	0.04	+0.39
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.56	0.31	+0.25
Sharpe Ratio (All Time) Calculated using the full available price history	0.56	0.60	-0.04

Correlation

The correlation between BYLD and AGG is 0.70, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

BYLD vs. AGG - Dividend Comparison

BYLD's dividend yield for the trailing twelve months is around 5.35%, more than AGG's 3.95% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BYLD iShares Yield Optimized Bond ETF	5.35%	5.32%	5.31%	4.45%	3.39%	2.18%	3.41%	3.67%	4.22%	3.22%	3.14%	3.37%
AGG iShares Core U.S. Aggregate Bond ETF	3.95%	3.89%	3.74%	3.13%	2.39%	1.77%	2.14%	2.70%	2.72%	2.32%	2.39%	2.45%

Drawdowns

BYLD vs. AGG - Drawdown Comparison

The maximum BYLD drawdown since its inception was -14.75%, smaller than the maximum AGG drawdown of -18.43%. Use the drawdown chart below to compare losses from any high point for BYLD and AGG.

Drawdown Indicators

	BYLD	AGG	Difference
Max Drawdown Largest peak-to-trough decline	-14.75%	-18.43%	+3.68%
Max Drawdown (1Y) Largest decline over 1 year	-2.72%	-2.52%	-0.20%
Max Drawdown (5Y) Largest decline over 5 years	-14.65%	-17.82%	+3.17%
Max Drawdown (10Y) Largest decline over 10 years	-14.75%	-18.43%	+3.68%
Current Drawdown Current decline from peak	-1.54%	-2.30%	+0.76%
Average Drawdown Average peak-to-trough decline	-2.54%	-2.71%	+0.17%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.75%	0.91%	-0.16%

Volatility

BYLD vs. AGG - Volatility Comparison

iShares Yield Optimized Bond ETF (BYLD) has a higher volatility of 2.00% compared to iShares Core U.S. Aggregate Bond ETF (AGG) at 1.67%. This indicates that BYLD's price experiences larger fluctuations and is considered to be riskier than AGG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BYLD	AGG	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.00%	1.67%	+0.33%
Volatility (6M) Calculated over the trailing 6-month period	2.71%	2.55%	+0.16%
Volatility (1Y) Calculated over the trailing 1-year period	4.61%	4.37%	+0.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.16%	6.07%	-0.91%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.43%	5.39%	+0.04%