BFMSX vs. BRHYX

Last updated Aug 1, 2026

BFMSX (BlackRock Low Duration Bond Portfolio) and BRHYX (BlackRock High Yield K) are both mutual funds - BFMSX is a Short-Term Bond fund managed by BlackRock, while BRHYX is a High Yield Bonds fund managed by BlackRock. Over the past 10 years, BFMSX returned 2.23%/yr vs 5.67%/yr for BRHYX. Their 0.25 correlation means their historical movements had little consistent relationship. BFMSX charges 0.41%/yr vs 0.48%/yr for BRHYX.

Performance

BFMSX vs. BRHYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BlackRock Low Duration Bond Portfolio (BFMSX) and BlackRock High Yield K (BRHYX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BFMSX achieves a 0.86% return, which is significantly lower than BRHYX's 1.22% return. Over the past 10 years, BFMSX has underperformed BRHYX with an annualized return of 2.23%, while BRHYX has yielded a comparatively higher 5.67% annualized return.

BFMSX

• 1D: 0.11%
• 1M: -0.22%
• 6M: 0.37%
• YTD: 0.86%
• 1Y: 3.19%
• 3Y*: 5.02%
• 5Y*: 2.10%
• 10Y*: 2.23%
• ALL TIME*: 3.35%

BRHYX

• 1D: 0.14%
• 1M: -0.84%
• 6M: 0.79%
• YTD: 1.22%
• 1Y: 5.26%
• 3Y*: 8.54%
• 5Y*: 4.12%
• 10Y*: 5.67%
• ALL TIME*: 6.74%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
BFMSX BlackRock Low Duration Bond Portfolio	$0.00	$0.00	$0.00
BRHYX BlackRock High Yield K	$0.00	$0.00	$0.00

BFMSX vs. BRHYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BFMSX BlackRock Low Duration Bond Portfolio	0.86%	6.20%	4.94%	4.96%	-5.34%	-0.33%	3.47%	4.75%	1.15%	1.98%
BRHYX BlackRock High Yield K	1.22%	9.44%	8.65%	13.26%	-11.18%	5.47%	5.98%	15.65%	-2.67%	8.34%

Correlation

The correlation between BFMSX and BRHYX is 0.58, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.58
Correlation (3Y) Balances recent behavior with more history.	0.49
Correlation (5Y) Shows whether the relationship held over a longer period.	0.48
Correlation (10Y) Provides a long-term view across more market conditions.	0.42
Correlation (All Time) Calculated using the full available price history since Nov 18, 1998	0.25

Over the past year, BFMSX and BRHYX have become more correlated (0.58) than their long-term average of 0.25, meaning their price movements have been converging.

Return for Risk

BFMSX vs. BRHYX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

BFMSX

BFMSX Risk / Return Rank: 84
BFMSX Sharpe Ratio Rank: 77
BFMSX Sortino Ratio Rank: 88
BFMSX Omega Ratio Rank: 88
BFMSX Calmar Ratio Rank: 77
BFMSX Martin Ratio Rank: 87

BRHYX

BRHYX Risk / Return Rank: 78
BRHYX Sharpe Ratio Rank: 70
BRHYX Sortino Ratio Rank: 81
BRHYX Omega Ratio Rank: 79
BRHYX Calmar Ratio Rank: 74
BRHYX Martin Ratio Rank: 87

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

BFMSX vs. BRHYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BlackRock Low Duration Bond Portfolio (BFMSX) and BlackRock High Yield K (BRHYX). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	BFMSX	BRHYX	Difference
Sharpe ratio: Return per unit of total volatility	1.85	1.60	+0.25
Sortino ratio: Return per unit of downside risk	3.28	2.75	+0.52
Omega ratio: Gain probability vs. loss probability	1.46	1.35	+0.10
Calmar ratio: Return relative to maximum drawdown	2.60	2.34	+0.26
Martin ratio: Return relative to average drawdown	11.61	11.03	+0.58

BFMSX vs. BRHYX - Sharpe Ratio Comparison

The current BFMSX Sharpe Ratio is 1.85, which is comparable to the BRHYX Sharpe Ratio of 1.60. The chart below compares the historical Sharpe Ratios of BFMSX and BRHYX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

BFMSX vs. BRHYX - Drawdown Comparison

The maximum BFMSX drawdown since its inception was -12.70%, smaller than the maximum BRHYX drawdown of -34.77%. Use the drawdown chart below to compare losses from any high point for BFMSX and BRHYX.

Drawdown Indicators

	BFMSX	BRHYX	Difference
Max Drawdown Largest peak-to-trough decline	-12.70%	-34.77%	+22.07%
Max Drawdown (1Y) Largest decline over 1 year	-1.52%	-2.40%	+0.88%
Max Drawdown (3Y) Largest decline over 3 years	-1.52%	-4.07%	+2.55%
Max Drawdown (5Y) Largest decline over 5 years	-7.96%	-15.29%	+7.33%
Max Drawdown (10Y) Largest decline over 10 years	-7.96%	-23.20%	+15.24%
Current Drawdown Current decline from peak	-0.33%	-0.98%	+0.65%
Average Drawdown Average peak-to-trough decline	-0.82%	-2.72%	+1.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.34%	0.51%	-0.17%

Volatility

BFMSX vs. BRHYX - Volatility Comparison

The current volatility for BlackRock Low Duration Bond Portfolio (BFMSX) is 0.45%, while BlackRock High Yield K (BRHYX) has a volatility of 0.71%. This indicates that BFMSX experiences smaller price fluctuations and is considered to be less risky than BRHYX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BFMSX	BRHYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.45%	0.71%	-0.26%
Volatility (6M) Calculated over the trailing 6-month period	1.75%	2.78%	-1.03%
Volatility (1Y) Calculated over the trailing 1-year period	2.15%	3.51%	-1.36%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.37%	5.27%	-2.90%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.12%	5.88%	-3.76%

BFMSX vs. BRHYX - Expense Ratio Comparison

BFMSX has a 0.41% expense ratio, which is lower than BRHYX's 0.48% expense ratio.

Dividends

BFMSX vs. BRHYX - Dividend Comparison

BFMSX's dividend yield for the trailing twelve months is around 4.27%, less than BRHYX's 6.62% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BFMSX BlackRock Low Duration Bond Portfolio	4.27%	4.56%	4.14%	3.34%	2.67%	1.23%	2.04%	2.63%	2.51%	2.17%	1.76%	1.87%
BRHYX BlackRock High Yield K	6.62%	7.14%	7.56%	6.20%	4.98%	4.80%	5.22%	5.82%	6.48%	5.92%	6.03%	6.42%

Frequently Asked Questions

Can I hold both BFMSX and BRHYX in my portfolio?

BFMSX and BRHYX have a correlation of 0.58, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BFMSX or BRHYX?

BRHYX has higher volatility (0.71%) compared to BFMSX (0.45%). In terms of maximum drawdown, BFMSX dropped -12.70% vs BRHYX's -34.77%.

Which has better risk-adjusted returns?

BFMSX currently has the higher Sharpe Ratio (1.85 vs 1.60), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.