RMBMX vs. FSMAX

Last updated Apr 1, 2026

Compare and contrast key facts about RMB SMID Cap Fund (RMBMX) and Fidelity Extended Market Index Fund (FSMAX).

RMBMX is managed by RMB Funds. It was launched on Dec 31, 2004. FSMAX is managed by Fidelity.

Performance

RMBMX vs. FSMAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in RMB SMID Cap Fund (RMBMX) and Fidelity Extended Market Index Fund (FSMAX). The values are adjusted to include any dividend payments, if applicable.

RMBMX vs. FSMAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RMBMX RMB SMID Cap Fund	-4.33%	2.46%	10.04%	20.32%	-20.36%	28.05%	24.43%	31.74%	-5.04%	13.65%
FSMAX Fidelity Extended Market Index Fund	-4.54%	11.40%	16.99%	25.36%	-26.44%	12.41%	32.28%	28.01%	-9.44%	18.04%

Returns By Period

The year-to-date returns for both stocks are quite close, with RMBMX having a -4.33% return and FSMAX slightly lower at -4.54%. Over the past 10 years, RMBMX has underperformed FSMAX with an annualized return of 10.01%, while FSMAX has yielded a comparatively higher 10.54% annualized return.

RMBMX

• 1D: -0.88%
• 1M: -9.20%
• YTD: -4.33%
• 6M: -5.63%
• 1Y: 2.23%
• 3Y*: 7.27%
• 5Y*: 4.07%
• 10Y*: 10.01%

FSMAX

• 1D: -1.03%
• 1M: -7.76%
• YTD: -4.54%
• 6M: -4.39%
• 1Y: 16.77%
• 3Y*: 13.78%
• 5Y*: 3.66%
• 10Y*: 10.54%

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

RMBMX vs. FSMAX - Expense Ratio Comparison

RMBMX has a 0.84% expense ratio, which is higher than FSMAX's 0.04% expense ratio.

RMBMX

RMB SMID Cap Fund

FSMAX

Fidelity Extended Market Index Fund

Return for Risk

RMBMX vs. FSMAX — Risk / Return Rank

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

RMBMX

RMBMX Risk / Return Rank: 7
RMBMX Sharpe Ratio Rank: 7
RMBMX Sortino Ratio Rank: 7
RMBMX Omega Ratio Rank: 7
RMBMX Calmar Ratio Rank: 7
RMBMX Martin Ratio Rank: 7

FSMAX

FSMAX Risk / Return Rank: 35
FSMAX Sharpe Ratio Rank: 33
FSMAX Sortino Ratio Rank: 36
FSMAX Omega Ratio Rank: 33
FSMAX Calmar Ratio Rank: 36
FSMAX Martin Ratio Rank: 38

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.

RMBMX vs. FSMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for RMB SMID Cap Fund (RMBMX) and Fidelity Extended Market Index Fund (FSMAX). 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.

	RMBMX	FSMAX	Difference
Sharpe ratio Return per unit of total volatility	0.12	0.72	-0.61
Sortino ratio Return per unit of downside risk	0.32	1.16	-0.84
Omega ratio Gain probability vs. loss probability	1.04	1.16	-0.12
Calmar ratio Return relative to maximum drawdown	0.05	0.95	-0.89
Martin ratio Return relative to average drawdown	0.20	3.91	-3.71
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RMBMX vs. FSMAX - Sharpe Ratio Comparison

The current RMBMX Sharpe Ratio is 0.12, which is lower than the FSMAX Sharpe Ratio of 0.72. The chart below compares the historical Sharpe Ratios of RMBMX and FSMAX, 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

	RMBMX	FSMAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.12	0.72	-0.61
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.20	0.16	+0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.48	0.35	+0.13
Sharpe Ratio (All Time) Calculated using the full available price history	0.39	0.41	-0.02

Correlation

The correlation between RMBMX and FSMAX is 0.95, 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

RMBMX vs. FSMAX - Dividend Comparison

RMBMX's dividend yield for the trailing twelve months is around 20.63%, more than FSMAX's 0.60% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RMBMX RMB SMID Cap Fund	20.63%	19.73%	9.50%	10.12%	8.40%	5.53%	5.34%	14.27%	15.63%	14.74%	18.84%	6.38%
FSMAX Fidelity Extended Market Index Fund	0.60%	0.57%	0.48%	1.17%	1.90%	7.49%	2.14%	4.30%	6.09%	5.44%	4.85%	6.34%

Drawdowns

RMBMX vs. FSMAX - Drawdown Comparison

The maximum RMBMX drawdown since its inception was -52.47%, roughly equal to the maximum FSMAX drawdown of -50.55%. Use the drawdown chart below to compare losses from any high point for RMBMX and FSMAX.

Drawdown Indicators

	RMBMX	FSMAX	Difference
Max Drawdown Largest peak-to-trough decline	-52.47%	-50.55%	-1.92%
Max Drawdown (1Y) Largest decline over 1 year	-13.58%	-14.64%	+1.06%
Max Drawdown (5Y) Largest decline over 5 years	-29.03%	-36.31%	+7.28%
Max Drawdown (10Y) Largest decline over 10 years	-39.63%	-50.55%	+10.92%
Current Drawdown Current decline from peak	-11.71%	-10.26%	-1.45%
Average Drawdown Average peak-to-trough decline	-7.97%	-12.29%	+4.32%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.56%	3.54%	+0.02%

Volatility

RMBMX vs. FSMAX - Volatility Comparison

The current volatility for RMB SMID Cap Fund (RMBMX) is 5.32%, while Fidelity Extended Market Index Fund (FSMAX) has a volatility of 6.01%. This indicates that RMBMX experiences smaller price fluctuations and is considered to be less risky than FSMAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RMBMX	FSMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.32%	6.01%	-0.69%
Volatility (6M) Calculated over the trailing 6-month period	11.31%	13.07%	-1.76%
Volatility (1Y) Calculated over the trailing 1-year period	20.75%	22.79%	-2.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.68%	22.32%	-1.64%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.76%	30.19%	-9.43%