FMFIX vs. DLSNX

Last updated Jun 24, 2026

FMFIX (RBB Free Market Fixed Income Fund) and DLSNX (DoubleLine Low Duration Bond Fund Class N) are both Short-Term Bond funds. Over the past 10 years, FMFIX returned 1.24%/yr vs 2.58%/yr for DLSNX. At a 0.50 correlation, their price movements are largely independent. FMFIX charges 0.68%/yr vs 0.70%/yr for DLSNX.

Performance

FMFIX vs. DLSNX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in RBB Free Market Fixed Income Fund (FMFIX) and DoubleLine Low Duration Bond Fund Class N (DLSNX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with FMFIX having a 1.00% return and DLSNX slightly lower at 0.96%. Over the past 10 years, FMFIX has underperformed DLSNX with an annualized return of 1.24%, while DLSNX has yielded a comparatively higher 2.58% annualized return.

FMFIX

• 1D: -0.10%
• 1M: 0.40%
• YTD: 1.00%
• 6M: 1.05%
• 1Y: 3.19%
• 3Y*: 3.32%
• 5Y*: 0.93%
• 10Y*: 1.24%

DLSNX

• 1D: -0.10%
• 1M: 0.23%
• YTD: 0.96%
• 6M: 1.14%
• 1Y: 3.72%
• 3Y*: 5.14%
• 5Y*: 2.91%
• 10Y*: 2.58%

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

FMFIX vs. DLSNX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FMFIX RBB Free Market Fixed Income Fund	1.00%	4.88%	0.71%	5.43%	-6.52%	-1.06%	3.28%	4.78%	0.65%	1.05%
DLSNX DoubleLine Low Duration Bond Fund Class N	0.96%	5.49%	5.06%	6.50%	-3.04%	0.56%	1.76%	4.47%	1.15%	2.30%

Correlation

The correlation between FMFIX and DLSNX is 0.66, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.66
Correlation (3Y) Calculated over the trailing 3-year period	0.70
Correlation (5Y) Calculated over the trailing 5-year period	0.72
Correlation (10Y) Calculated over the trailing 10-year period	0.58
Correlation (All Time) Calculated using the full available price history since Oct 6, 2011	0.50

The correlation between FMFIX and DLSNX shifts across timeframes, from 0.50 (all time) to 0.72 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

FMFIX vs. DLSNX — Risk / Return Rank

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

FMFIX

FMFIX Risk / Return Rank: 68
FMFIX Sharpe Ratio Rank: 61
FMFIX Sortino Ratio Rank: 71
FMFIX Omega Ratio Rank: 75
FMFIX Calmar Ratio Rank: 72
FMFIX Martin Ratio Rank: 62

DLSNX

DLSNX Risk / Return Rank: 96
DLSNX Sharpe Ratio Rank: 96
DLSNX Sortino Ratio Rank: 97
DLSNX Omega Ratio Rank: 97
DLSNX Calmar Ratio Rank: 95
DLSNX Martin Ratio Rank: 97

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.

FMFIX vs. DLSNX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for RBB Free Market Fixed Income Fund (FMFIX) and DoubleLine Low Duration Bond Fund Class N (DLSNX). 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.

	FMFIX	DLSNX	Difference
Sharpe ratio: Return per unit of total volatility	2.12	3.24	-1.13
Sortino ratio: Return per unit of downside risk	3.20	5.22	-2.02
Omega ratio: Gain probability vs. loss probability	1.45	1.88	-0.44
Calmar ratio: Return relative to maximum drawdown	3.13	5.31	-2.18
Martin ratio: Return relative to average drawdown	11.47	24.98	-13.51

FMFIX vs. DLSNX - Sharpe Ratio Comparison

The current FMFIX Sharpe Ratio is 2.12, which is lower than the DLSNX Sharpe Ratio of 3.24. The chart below compares the historical Sharpe Ratios of FMFIX and DLSNX, 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

FMFIX vs. DLSNX - Drawdown Comparison

The maximum FMFIX drawdown since its inception was -9.35%, which is greater than DLSNX's maximum drawdown of -7.46%. Use the drawdown chart below to compare losses from any high point for FMFIX and DLSNX.

Drawdown Indicators

	FMFIX	DLSNX	Difference
Max Drawdown Largest peak-to-trough decline	-9.35%	-7.46%	-1.89%
Max Drawdown (1Y) Largest decline over 1 year	-1.09%	-0.72%	-0.37%
Max Drawdown (3Y) Largest decline over 3 years	-3.72%	-0.72%	-3.00%
Max Drawdown (5Y) Largest decline over 5 years	-9.26%	-4.91%	-4.35%
Max Drawdown (10Y) Largest decline over 10 years	-9.35%	-7.46%	-1.89%
Current Drawdown Current decline from peak	-0.10%	-0.21%	+0.11%
Average Drawdown Average peak-to-trough decline	-1.22%	-0.41%	-0.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.30%	0.15%	+0.15%

Volatility

FMFIX vs. DLSNX - Volatility Comparison

RBB Free Market Fixed Income Fund (FMFIX) has a higher volatility of 0.51% compared to DoubleLine Low Duration Bond Fund Class N (DLSNX) at 0.37%. This indicates that FMFIX's price experiences larger fluctuations and is considered to be riskier than DLSNX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FMFIX	DLSNX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.51%	0.37%	+0.14%
Volatility (6M) Calculated over the trailing 6-month period	1.29%	0.90%	+0.39%
Volatility (1Y) Calculated over the trailing 1-year period	1.61%	1.19%	+0.42%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.88%	1.42%	+1.46%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.44%	1.57%	+0.87%

FMFIX vs. DLSNX - Expense Ratio Comparison

FMFIX has a 0.68% expense ratio, which is lower than DLSNX's 0.70% expense ratio.

Dividends

FMFIX vs. DLSNX - Dividend Comparison

FMFIX's dividend yield for the trailing twelve months is around 3.64%, less than DLSNX's 4.30% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DLSNX DoubleLine Low Duration Bond Fund Class N	4.30%	4.40%	4.85%	4.25%	2.24%	1.47%	2.12%	2.96%	2.67%	2.18%	2.27%	2.22%
FMFIX RBB Free Market Fixed Income Fund	3.64%	3.49%	0.71%	2.75%	1.35%	0.37%	1.22%	1.44%	2.45%	1.25%	0.58%	0.39%

Frequently Asked Questions

Can I hold both FMFIX and DLSNX in my portfolio?

FMFIX and DLSNX have a correlation of 0.66, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FMFIX or DLSNX?

FMFIX has higher volatility (0.51%) compared to DLSNX (0.37%). In terms of maximum drawdown, FMFIX dropped -9.35% vs DLSNX's -7.46%.

Which has better risk-adjusted returns?

DLSNX currently has the higher Sharpe Ratio (3.24 vs 2.12), 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.