BRMKX vs. FSMDX
BRMKX (iShares Russell Mid-Cap Index Fund) and FSMDX (Fidelity Mid Cap Index Fund) are both Mid Cap Blend Equities funds. Over the past 10 years, BRMKX returned 12.12%/yr vs 12.12%/yr for FSMDX. With a 0.99 correlation, they move nearly in lockstep. BRMKX charges 0.06%/yr vs 0.03%/yr for FSMDX.
Performance
BRMKX vs. FSMDX - Performance Comparison
Loading charts...
Returns By Period
The year-to-date returns for both stocks are quite close, with BRMKX having a 14.11% return and FSMDX slightly lower at 14.03%. Over a longer period, both investments have demonstrated similar performance, with their 10-year annualized returns being quite close: BRMKX at 12.12% and FSMDX at 12.12%.
BRMKX
- 1D
- 0.51%
- 1M
- 3.34%
- YTD
- 14.11%
- 6M
- 12.58%
- 1Y
- 22.60%
- 3Y*
- 17.54%
- 5Y*
- 8.49%
- 10Y*
- 12.12%
FSMDX
- 1D
- 0.53%
- 1M
- 3.31%
- YTD
- 14.03%
- 6M
- 12.50%
- 1Y
- 22.60%
- 3Y*
- 17.64%
- 5Y*
- 8.51%
- 10Y*
- 12.12%
BRMKX vs. FSMDX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
BRMKX iShares Russell Mid-Cap Index Fund | 14.11% | 10.48% | 15.28% | 17.30% | -17.22% | 22.52% | 17.17% | 30.47% | -9.09% | 17.74% |
FSMDX Fidelity Mid Cap Index Fund | 14.03% | 10.58% | 15.55% | 17.20% | -17.27% | 22.56% | 17.13% | 30.53% | -9.38% | 18.04% |
Correlation
The correlation between BRMKX and FSMDX is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 1.00 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.99 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.99 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.99 |
Correlation (All Time) Calculated using the full available price history since Jan 4, 2016 | 0.99 |
The correlation between BRMKX and FSMDX has been stable across timeframes, ranging from 0.99 to 1.00 - a consistent structural relationship.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
BRMKX vs. FSMDX — Risk / Return Rank
BRMKX
FSMDX
BRMKX vs. FSMDX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Russell Mid-Cap Index Fund (BRMKX) and Fidelity Mid Cap Index Fund (FSMDX). 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.
| BRMKX | FSMDX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | 0.00 | ||
| Sortino ratioReturn per unit of downside risk | -0.01 | ||
| Omega ratioGain probability vs. loss probability | 1.30 | 1.30 | 0.00 |
| Calmar ratioReturn relative to maximum drawdown | 2.90 | 2.90 | 0.00 |
| Martin ratioReturn relative to average drawdown | 11.11 | 11.11 | 0.00 |
Loading charts...
Drawdowns
BRMKX vs. FSMDX - Drawdown Comparison
The maximum BRMKX drawdown since its inception was -40.20%, roughly equal to the maximum FSMDX drawdown of -40.35%. Use the drawdown chart below to compare losses from any high point for BRMKX and FSMDX.
Loading charts...
Drawdown Indicators
| BRMKX | FSMDX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -40.20% | -40.35% | +0.15% |
Max Drawdown (1Y)Largest decline over 1 year | -8.17% | -8.16% | -0.01% |
Max Drawdown (3Y)Largest decline over 3 years | -21.07% | -20.92% | -0.15% |
Max Drawdown (5Y)Largest decline over 5 years | -26.04% | -26.07% | +0.03% |
Max Drawdown (10Y)Largest decline over 10 years | -40.20% | -40.35% | +0.15% |
Current DrawdownCurrent decline from peak | -0.23% | -0.26% | +0.03% |
Average DrawdownAverage peak-to-trough decline | -5.63% | -4.94% | -0.69% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.13% | 2.13% | 0.00% |
Volatility
BRMKX vs. FSMDX - Volatility Comparison
iShares Russell Mid-Cap Index Fund (BRMKX) and Fidelity Mid Cap Index Fund (FSMDX) have volatilities of 4.44% and 4.43%, 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.
Loading charts...
Volatility by Period
| BRMKX | FSMDX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.44% | 4.43% | +0.01% |
Volatility (6M)Calculated over the trailing 6-month period | 10.47% | 10.46% | +0.01% |
Volatility (1Y)Calculated over the trailing 1-year period | 13.86% | 13.85% | +0.01% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 18.30% | 18.32% | -0.02% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 19.35% | 19.35% | 0.00% |
BRMKX vs. FSMDX - Expense Ratio Comparison
BRMKX has a 0.06% expense ratio, which is higher than FSMDX's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
BRMKX vs. FSMDX - Dividend Comparison
BRMKX's dividend yield for the trailing twelve months is around 5.22%, more than FSMDX's 0.97% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BRMKX iShares Russell Mid-Cap Index Fund | 5.22% | 5.92% | 6.43% | 3.02% | 3.67% | 4.07% | 2.86% | 3.95% | 3.87% | 19.24% | 2.11% | 0.00% |
FSMDX Fidelity Mid Cap Index Fund | 0.97% | 1.10% | 2.46% | 1.39% | 2.07% | 3.35% | 2.34% | 2.86% | 2.21% | 2.17% | 2.23% | 2.84% |
Frequently Asked Questions
With a correlation of 1.00, BRMKX and FSMDX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
BRMKX has higher volatility (4.44%) compared to FSMDX (4.43%). In terms of maximum drawdown, BRMKX dropped -40.20% vs FSMDX's -40.35%.
FSMDX currently has the higher Sharpe Ratio (1.72 vs 1.71), 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.
Find the right allocation for BRMKX and FSMDX
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer