RMBKX vs. FFSIX

Last updated Jun 4, 2026

RMBKX (RMB Mendon Financial Services Fund) and FFSIX (Fidelity Advisor Financial Services Fund Class I) are both Financials Equities funds from BlackRock. Over the past 10 years, RMBKX returned 10.38%/yr vs 13.59%/yr for FFSIX. Their correlation of 0.83 suggests significant overlap in exposure. RMBKX charges 1.27%/yr vs 0.76%/yr for FFSIX.

Performance

RMBKX vs. FFSIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in RMB Mendon Financial Services Fund (RMBKX) and Fidelity Advisor Financial Services Fund Class I (FFSIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RMBKX achieves a 8.77% return, which is significantly higher than FFSIX's -1.97% return. Over the past 10 years, RMBKX has underperformed FFSIX with an annualized return of 10.38%, while FFSIX has yielded a comparatively higher 13.59% annualized return.

RMBKX

• 1D: 1.24%
• 1M: 1.49%
• YTD: 8.77%
• 6M: 12.83%
• 1Y: 30.64%
• 3Y*: 22.08%
• 5Y*: 6.42%
• 10Y*: 10.38%

FFSIX

• 1D: 0.18%
• 1M: -0.13%
• YTD: -1.97%
• 6M: 1.50%
• 1Y: 8.71%
• 3Y*: 23.57%
• 5Y*: 10.82%
• 10Y*: 13.59%

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

RMBKX vs. FFSIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RMBKX RMB Mendon Financial Services Fund	8.77%	12.84%	17.07%	4.56%	-19.18%	56.40%	-5.73%	22.82%	-17.13%	12.17%
FFSIX Fidelity Advisor Financial Services Fund Class I	-1.97%	15.23%	39.62%	14.33%	-8.71%	33.30%	0.06%	34.10%	-15.84%	20.23%

Correlation

The correlation between RMBKX and FFSIX is 0.76, 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	0.76
Correlation (3Y) Calculated over the trailing 3-year period	0.81
Correlation (5Y) Calculated over the trailing 5-year period	0.84
Correlation (10Y) Calculated over the trailing 10-year period	0.85
Correlation (All Time) Calculated using the full available price history since Aug 6, 2012	0.83

The correlation between RMBKX and FFSIX has been stable across timeframes, ranging from 0.76 to 0.85 - a consistent structural relationship.

Return for Risk

RMBKX vs. FFSIX — Risk / Return Rank

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

RMBKX

RMBKX Risk / Return Rank: 42
RMBKX Sharpe Ratio Rank: 31
RMBKX Sortino Ratio Rank: 30
RMBKX Omega Ratio Rank: 29
RMBKX Calmar Ratio Rank: 77
RMBKX Martin Ratio Rank: 43

FFSIX

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

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.

RMBKX vs. FFSIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for RMB Mendon Financial Services Fund (RMBKX) and Fidelity Advisor Financial Services Fund Class I (FFSIX). 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.

	RMBKX	FFSIX	Difference
Sharpe ratio: Return per unit of total volatility	1.58	0.59	+0.99
Sortino ratio: Return per unit of downside risk	2.27	0.89	+1.37
Omega ratio: Gain probability vs. loss probability	1.28	1.11	+0.17
Calmar ratio: Return relative to maximum drawdown	3.46	0.72	+2.74
Martin ratio: Return relative to average drawdown	9.13	2.07	+7.06
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RMBKX vs. FFSIX - Sharpe Ratio Comparison

The current RMBKX Sharpe Ratio is 1.58, which is higher than the FFSIX Sharpe Ratio of 0.59. The chart below compares the historical Sharpe Ratios of RMBKX and FFSIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	RMBKX	FFSIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.58	0.59	+0.99
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.26	0.51	-0.26
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.38	0.57	-0.19
Sharpe Ratio (All Time) Calculated using the full available price history	0.50	0.32	+0.19

Drawdowns

RMBKX vs. FFSIX - Drawdown Comparison

The maximum RMBKX drawdown since its inception was -55.45%, smaller than the maximum FFSIX drawdown of -75.57%. Use the drawdown chart below to compare losses from any high point for RMBKX and FFSIX.

Drawdown Indicators

	RMBKX	FFSIX	Difference
Max Drawdown Largest peak-to-trough decline	-55.45%	-75.57%	+20.12%
Max Drawdown (1Y) Largest decline over 1 year	-9.48%	-12.99%	+3.51%
Max Drawdown (3Y) Largest decline over 3 years	-24.98%	-19.38%	-5.60%
Max Drawdown (5Y) Largest decline over 5 years	-44.33%	-24.92%	-19.41%
Max Drawdown (10Y) Largest decline over 10 years	-55.45%	-45.98%	-9.47%
Current Drawdown Current decline from peak	-1.31%	-4.93%	+3.62%
Average Drawdown Average peak-to-trough decline	-11.08%	-17.18%	+6.10%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.59%	4.52%	-0.93%

Volatility

RMBKX vs. FFSIX - Volatility Comparison

RMB Mendon Financial Services Fund (RMBKX) has a higher volatility of 4.89% compared to Fidelity Advisor Financial Services Fund Class I (FFSIX) at 3.36%. This indicates that RMBKX's price experiences larger fluctuations and is considered to be riskier than FFSIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RMBKX	FFSIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.89%	3.36%	+1.53%
Volatility (6M) Calculated over the trailing 6-month period	13.55%	11.80%	+1.75%
Volatility (1Y) Calculated over the trailing 1-year period	20.86%	15.85%	+5.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	24.85%	21.12%	+3.73%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	27.16%	23.86%	+3.30%

RMBKX vs. FFSIX - Expense Ratio Comparison

RMBKX has a 1.27% expense ratio, which is higher than FFSIX's 0.76% expense ratio.

Dividends

RMBKX vs. FFSIX - Dividend Comparison

RMBKX's dividend yield for the trailing twelve months is around 5.72%, less than FFSIX's 7.08% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FFSIX Fidelity Advisor Financial Services Fund Class I	7.08%	6.94%	9.90%	2.45%	6.01%	4.31%	2.61%	1.43%	4.23%	0.06%	0.32%	0.63%
RMBKX RMB Mendon Financial Services Fund	5.72%	6.22%	1.90%	1.29%	17.29%	1.35%	0.00%	0.85%	5.39%	6.63%	1.50%	0.00%

Frequently Asked Questions

Can I hold both RMBKX and FFSIX in my portfolio?

RMBKX and FFSIX have a correlation of 0.76, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RMBKX or FFSIX?

RMBKX has higher volatility (4.89%) compared to FFSIX (3.36%). In terms of maximum drawdown, RMBKX dropped -55.45% vs FFSIX's -75.57%.

Which has better risk-adjusted returns?

RMBKX currently has the higher Sharpe Ratio (1.58 vs 0.59), 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.