BRMKX vs. FXAIX
BRMKX (iShares Russell Mid-Cap Index Fund) and FXAIX (Fidelity 500 Index Fund) are both mutual funds - BRMKX is a Mid Cap Blend Equities fund managed by BlackRock, while FXAIX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, BRMKX returned 12.05%/yr vs 15.62%/yr for FXAIX. Their correlation of 0.90 suggests significant overlap in exposure. BRMKX charges 0.06%/yr vs 0.02%/yr for FXAIX.
Performance
BRMKX vs. FXAIX - Performance Comparison
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Returns By Period
In the year-to-date period, BRMKX achieves a 13.46% return, which is significantly higher than FXAIX's 8.11% return. Over the past 10 years, BRMKX has underperformed FXAIX with an annualized return of 12.05%, while FXAIX has yielded a comparatively higher 15.62% annualized return.
BRMKX
- 1D
- 0.63%
- 1M
- 1.86%
- YTD
- 13.46%
- 6M
- 11.58%
- 1Y
- 21.51%
- 3Y*
- 17.32%
- 5Y*
- 8.04%
- 10Y*
- 12.05%
FXAIX
- 1D
- -0.10%
- 1M
- -2.04%
- YTD
- 8.11%
- 6M
- 6.78%
- 1Y
- 22.23%
- 3Y*
- 20.77%
- 5Y*
- 13.05%
- 10Y*
- 15.62%
BRMKX vs. FXAIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
BRMKX iShares Russell Mid-Cap Index Fund | 13.46% | 10.48% | 15.28% | 17.30% | -17.22% | 22.52% | 17.17% | 30.47% | -9.09% | 17.74% |
FXAIX Fidelity 500 Index Fund | 8.11% | 17.84% | 25.01% | 26.29% | -18.14% | 28.71% | 18.42% | 31.48% | -4.43% | 21.82% |
Correlation
The correlation between BRMKX and FXAIX is 0.77, 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 | 0.77 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.82 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.88 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.89 |
Correlation (All Time) Calculated using the full available price history since Jan 4, 2016 | 0.90 |
The correlation between BRMKX and FXAIX shifts across timeframes, from 0.77 (1 year) to 0.90 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
BRMKX vs. FXAIX — Risk / Return Rank
BRMKX
FXAIX
BRMKX vs. FXAIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares Russell Mid-Cap Index Fund (BRMKX) and Fidelity 500 Index Fund (FXAIX). 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 | FXAIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.30 | ||
| Sortino ratioReturn per unit of downside risk | -0.30 | ||
| Omega ratioGain probability vs. loss probability | 1.26 | 1.32 | -0.07 |
| Calmar ratioReturn relative to maximum drawdown | 2.52 | 2.51 | +0.01 |
| Martin ratioReturn relative to average drawdown | 9.64 | 11.22 | -1.58 |
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Drawdowns
BRMKX vs. FXAIX - Drawdown Comparison
The maximum BRMKX drawdown since its inception was -40.20%, which is greater than FXAIX's maximum drawdown of -33.79%. Use the drawdown chart below to compare losses from any high point for BRMKX and FXAIX.
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Drawdown Indicators
| BRMKX | FXAIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -40.20% | -33.79% | -6.41% |
Max Drawdown (1Y)Largest decline over 1 year | -8.17% | -8.89% | +0.72% |
Max Drawdown (3Y)Largest decline over 3 years | -21.07% | -18.76% | -2.31% |
Max Drawdown (5Y)Largest decline over 5 years | -26.04% | -24.50% | -1.54% |
Max Drawdown (10Y)Largest decline over 10 years | -40.20% | -33.79% | -6.41% |
Current DrawdownCurrent decline from peak | -0.79% | -3.22% | +2.43% |
Average DrawdownAverage peak-to-trough decline | -5.62% | -3.79% | -1.83% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.13% | 1.99% | +0.14% |
Volatility
BRMKX vs. FXAIX - Volatility Comparison
The current volatility for iShares Russell Mid-Cap Index Fund (BRMKX) is 4.62%, while Fidelity 500 Index Fund (FXAIX) has a volatility of 4.88%. This indicates that BRMKX experiences smaller price fluctuations and is considered to be less risky than FXAIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| BRMKX | FXAIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.62% | 4.88% | -0.26% |
Volatility (6M)Calculated over the trailing 6-month period | 10.54% | 9.90% | +0.64% |
Volatility (1Y)Calculated over the trailing 1-year period | 13.88% | 12.54% | +1.34% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 18.31% | 17.02% | +1.29% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 19.31% | 18.08% | +1.23% |
BRMKX vs. FXAIX - Expense Ratio Comparison
BRMKX has a 0.06% expense ratio, which is higher than FXAIX's 0.02% 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. FXAIX - Dividend Comparison
BRMKX's dividend yield for the trailing twelve months is around 5.25%, more than FXAIX's 1.06% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BRMKX iShares Russell Mid-Cap Index Fund | 5.25% | 5.92% | 6.43% | 3.02% | 3.67% | 4.07% | 2.86% | 3.95% | 3.87% | 19.24% | 2.11% | 0.00% |
FXAIX Fidelity 500 Index Fund | 1.06% | 1.11% | 1.25% | 1.45% | 1.69% | 1.22% | 1.60% | 2.06% | 2.72% | 1.97% | 2.52% | 2.83% |
Frequently Asked Questions
BRMKX and FXAIX have a correlation of 0.77, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
FXAIX has higher volatility (4.88%) compared to BRMKX (4.62%). In terms of maximum drawdown, BRMKX dropped -40.20% vs FXAIX's -33.79%.
FXAIX currently has the higher Sharpe Ratio (1.79 vs 1.49), 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.
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