BBBMX vs. SEMRX

Last updated Jun 25, 2026

BBBMX (BBH Limited Duration Fund Class N) and SEMRX (Semper Short Duration Fund) are both Ultrashort Bond funds. Over the past 10 years, BBBMX returned 3.35%/yr vs 3.41%/yr for SEMRX. At a 0.30 correlation, their price movements are largely independent. BBBMX charges 0.35%/yr vs 0.85%/yr for SEMRX.

Performance

BBBMX vs. SEMRX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in BBH Limited Duration Fund Class N (BBBMX) and Semper Short Duration Fund (SEMRX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BBBMX achieves a 1.23% return, which is significantly lower than SEMRX's 2.15% return. Both investments have delivered pretty close results over the past 10 years, with BBBMX having a 3.35% annualized return and SEMRX not far ahead at 3.41%.

BBBMX

• 1D: 0.00%
• 1M: 0.25%
• YTD: 1.23%
• 6M: 1.64%
• 1Y: 4.42%
• 3Y*: 6.13%
• 5Y*: 3.89%
• 10Y*: 3.35%

SEMRX

• 1D: 0.00%
• 1M: 0.56%
• YTD: 2.15%
• 6M: 2.65%
• 1Y: 5.73%
• 3Y*: 7.34%
• 5Y*: 4.80%
• 10Y*: 3.41%

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

BBBMX vs. SEMRX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BBBMX BBH Limited Duration Fund Class N	1.23%	5.54%	6.81%	7.44%	-1.48%	1.10%	2.78%	4.30%	1.99%	2.31%
SEMRX Semper Short Duration Fund	2.15%	6.47%	8.21%	8.76%	-1.69%	1.93%	-1.19%	3.48%	2.11%	2.74%

Correlation

The correlation between BBBMX and SEMRX is 0.50, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.50
Correlation (3Y) Calculated over the trailing 3-year period	0.51
Correlation (5Y) Calculated over the trailing 5-year period	0.48
Correlation (10Y) Calculated over the trailing 10-year period	0.40
Correlation (All Time) Calculated using the full available price history since Jan 3, 2011	0.30

The correlation between BBBMX and SEMRX shifts across timeframes, from 0.30 (all time) to 0.51 (3 years), reflecting how their relationship changes across market environments.

Return for Risk

BBBMX vs. SEMRX — Risk / Return Rank

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

BBBMX

BBBMX Risk / Return Rank: 97
BBBMX Sharpe Ratio Rank: 92
BBBMX Sortino Ratio Rank: 99
BBBMX Omega Ratio Rank: 98
BBBMX Calmar Ratio Rank: 98
BBBMX Martin Ratio Rank: 99

SEMRX

SEMRX Risk / Return Rank: 98
SEMRX Sharpe Ratio Rank: 96
SEMRX Sortino Ratio Rank: 99
SEMRX Omega Ratio Rank: 99
SEMRX Calmar Ratio Rank: 99
SEMRX Martin Ratio Rank: 99

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.

BBBMX vs. SEMRX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for BBH Limited Duration Fund Class N (BBBMX) and Semper Short Duration Fund (SEMRX). 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.

	BBBMX	SEMRX	Difference
Sharpe ratio: Return per unit of total volatility	2.81	3.15	-0.34
Sortino ratio: Return per unit of downside risk	8.00	10.69	-2.68
Omega ratio: Gain probability vs. loss probability	2.46	3.09	-0.64
Calmar ratio: Return relative to maximum drawdown	7.96	11.22	-3.27
Martin ratio: Return relative to average drawdown	37.03	46.32	-9.30

BBBMX vs. SEMRX - Sharpe Ratio Comparison

The current BBBMX Sharpe Ratio is 2.81, which is comparable to the SEMRX Sharpe Ratio of 3.15. The chart below compares the historical Sharpe Ratios of BBBMX and SEMRX, 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

BBBMX vs. SEMRX - Drawdown Comparison

The maximum BBBMX drawdown since its inception was -6.50%, smaller than the maximum SEMRX drawdown of -13.09%. Use the drawdown chart below to compare losses from any high point for BBBMX and SEMRX.

Drawdown Indicators

	BBBMX	SEMRX	Difference
Max Drawdown Largest peak-to-trough decline	-6.50%	-13.09%	+6.59%
Max Drawdown (1Y) Largest decline over 1 year	-0.57%	-0.52%	-0.05%
Max Drawdown (3Y) Largest decline over 3 years	-0.57%	-0.63%	+0.06%
Max Drawdown (5Y) Largest decline over 5 years	-3.18%	-4.05%	+0.87%
Max Drawdown (10Y) Largest decline over 10 years	-6.50%	-13.09%	+6.59%
Current Drawdown Current decline from peak	-0.19%	-0.10%	-0.09%
Average Drawdown Average peak-to-trough decline	-0.57%	-0.62%	+0.05%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.12%	0.13%	-0.01%

Volatility

BBBMX vs. SEMRX - Volatility Comparison

BBH Limited Duration Fund Class N (BBBMX) and Semper Short Duration Fund (SEMRX) have volatilities of 0.49% and 0.51%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BBBMX	SEMRX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.49%	0.51%	-0.02%
Volatility (6M) Calculated over the trailing 6-month period	1.21%	1.28%	-0.07%
Volatility (1Y) Calculated over the trailing 1-year period	1.62%	1.86%	-0.24%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.56%	1.84%	-0.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.48%	2.31%	-0.83%

BBBMX vs. SEMRX - Expense Ratio Comparison

BBBMX has a 0.35% expense ratio, which is lower than SEMRX's 0.85% expense ratio.

Dividends

BBBMX vs. SEMRX - Dividend Comparison

BBBMX's dividend yield for the trailing twelve months is around 4.53%, less than SEMRX's 5.67% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BBBMX BBH Limited Duration Fund Class N	4.53%	4.60%	4.80%	4.23%	1.78%	1.29%	2.03%	2.93%	2.57%	1.99%	2.00%	1.72%
SEMRX Semper Short Duration Fund	5.67%	5.94%	6.13%	6.05%	3.22%	1.71%	1.95%	2.90%	2.70%	2.20%	3.03%	2.35%

Frequently Asked Questions

Can I hold both BBBMX and SEMRX in my portfolio?

BBBMX and SEMRX have a correlation of 0.50, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BBBMX or SEMRX?

SEMRX has higher volatility (0.51%) compared to BBBMX (0.49%). In terms of maximum drawdown, BBBMX dropped -6.50% vs SEMRX's -13.09%.

Which has better risk-adjusted returns?

SEMRX currently has the higher Sharpe Ratio (3.15 vs 2.81), 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.