ELFNX vs. MRFOX

Last updated Apr 1, 2026

Compare and contrast key facts about Elfun Trusts (ELFNX) and Marshfield Concentrated Opportunity Fund (MRFOX).

ELFNX is managed by State Street. It was launched on May 27, 1935. MRFOX is managed by Marshfield. It was launched on Dec 29, 2015.

Performance

ELFNX vs. MRFOX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Elfun Trusts (ELFNX) and Marshfield Concentrated Opportunity Fund (MRFOX). The values are adjusted to include any dividend payments, if applicable.

ELFNX vs. MRFOX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ELFNX Elfun Trusts	-9.40%	16.64%	26.91%	34.50%	-19.91%	24.46%	25.18%	35.57%	-3.25%	25.60%
MRFOX Marshfield Concentrated Opportunity Fund	-4.08%	10.05%	17.10%	17.68%	5.06%	17.71%	15.19%	36.26%	1.89%	25.92%

Returns By Period

In the year-to-date period, ELFNX achieves a -9.40% return, which is significantly lower than MRFOX's -4.08% return. Both investments have delivered pretty close results over the past 10 years, with ELFNX having a 14.84% annualized return and MRFOX not far ahead at 15.18%.

ELFNX

• 1D: -0.21%
• 1M: -7.68%
• YTD: -9.40%
• 6M: -6.55%
• 1Y: 12.68%
• 3Y*: 18.88%
• 5Y*: 10.93%
• 10Y*: 14.84%

MRFOX

• 1D: 0.67%
• 1M: -5.13%
• YTD: -4.08%
• 6M: -4.60%
• 1Y: 2.70%
• 3Y*: 12.36%
• 5Y*: 10.91%
• 10Y*: 15.18%

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

ELFNX vs. MRFOX - Expense Ratio Comparison

ELFNX has a 0.18% expense ratio, which is lower than MRFOX's 1.05% expense ratio.

MRFOX

Marshfield Concentrated Opportunity Fund

ELFNX

Elfun Trusts

Return for Risk

ELFNX vs. MRFOX — Risk / Return Rank

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

ELFNX

ELFNX Risk / Return Rank: 34
ELFNX Sharpe Ratio Rank: 32
ELFNX Sortino Ratio Rank: 34
ELFNX Omega Ratio Rank: 35
ELFNX Calmar Ratio Rank: 34
ELFNX Martin Ratio Rank: 33

MRFOX

MRFOX Risk / Return Rank: 12
MRFOX Sharpe Ratio Rank: 13
MRFOX Sortino Ratio Rank: 13
MRFOX Omega Ratio Rank: 11
MRFOX Calmar Ratio Rank: 12
MRFOX Martin Ratio Rank: 11

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.

ELFNX vs. MRFOX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Elfun Trusts (ELFNX) and Marshfield Concentrated Opportunity Fund (MRFOX). 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.

	ELFNX	MRFOX	Difference
Sharpe ratio Return per unit of total volatility	0.71	0.31	+0.40
Sortino ratio Return per unit of downside risk	1.13	0.54	+0.59
Omega ratio Gain probability vs. loss probability	1.16	1.07	+0.10
Calmar ratio Return relative to maximum drawdown	0.93	0.31	+0.62
Martin ratio Return relative to average drawdown	3.55	0.80	+2.75
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ELFNX vs. MRFOX - Sharpe Ratio Comparison

The current ELFNX Sharpe Ratio is 0.71, which is higher than the MRFOX Sharpe Ratio of 0.31. The chart below compares the historical Sharpe Ratios of ELFNX and MRFOX, 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

	ELFNX	MRFOX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.71	0.31	+0.40
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.61	0.91	-0.30
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.81	1.07	-0.25
Sharpe Ratio (All Time) Calculated using the full available price history	0.58	1.05	-0.48

Correlation

The correlation between ELFNX and MRFOX is 0.74, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

ELFNX vs. MRFOX - Dividend Comparison

ELFNX's dividend yield for the trailing twelve months is around 10.89%, more than MRFOX's 1.69% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ELFNX Elfun Trusts	10.89%	9.87%	10.43%	2.90%	9.01%	11.62%	8.60%	9.39%	16.18%	10.80%	8.85%	8.22%
MRFOX Marshfield Concentrated Opportunity Fund	1.69%	1.62%	4.59%	0.46%	0.35%	6.78%	2.68%	1.39%	1.94%	2.06%	0.60%	0.00%

Drawdowns

ELFNX vs. MRFOX - Drawdown Comparison

The maximum ELFNX drawdown since its inception was -50.28%, which is greater than MRFOX's maximum drawdown of -29.10%. Use the drawdown chart below to compare losses from any high point for ELFNX and MRFOX.

Drawdown Indicators

	ELFNX	MRFOX	Difference
Max Drawdown Largest peak-to-trough decline	-50.28%	-29.10%	-21.18%
Max Drawdown (1Y) Largest decline over 1 year	-11.48%	-7.09%	-4.39%
Max Drawdown (5Y) Largest decline over 5 years	-26.39%	-12.98%	-13.41%
Max Drawdown (10Y) Largest decline over 10 years	-32.44%	-29.10%	-3.34%
Current Drawdown Current decline from peak	-11.40%	-6.40%	-5.00%
Average Drawdown Average peak-to-trough decline	-7.65%	-2.37%	-5.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.01%	2.75%	+0.26%

Volatility

ELFNX vs. MRFOX - Volatility Comparison

Elfun Trusts (ELFNX) has a higher volatility of 4.40% compared to Marshfield Concentrated Opportunity Fund (MRFOX) at 2.74%. This indicates that ELFNX's price experiences larger fluctuations and is considered to be riskier than MRFOX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ELFNX	MRFOX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.40%	2.74%	+1.66%
Volatility (6M) Calculated over the trailing 6-month period	9.57%	7.00%	+2.57%
Volatility (1Y) Calculated over the trailing 1-year period	18.37%	11.79%	+6.58%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.87%	12.04%	+5.83%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.35%	14.29%	+4.06%