FMDGX vs. ^GSPC
FMDGX (Fidelity Mid Cap Growth Index Fund) is Mid Cap Growth Equities fund managed by Fidelity, while ^GSPC (S&P 500 Index) is an index. Over the past 5 years, FMDGX returned 5.97%/yr vs 11.84%/yr for ^GSPC. Their correlation of 0.87 suggests significant overlap in exposure.
Performance
FMDGX vs. ^GSPC - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, FMDGX achieves a 2.88% return, which is significantly lower than ^GSPC's 8.56% return.
FMDGX
- 1D
- 2.79%
- 1M
- 3.17%
- YTD
- 2.88%
- 6M
- 1.30%
- 1Y
- 4.63%
- 3Y*
- 15.12%
- 5Y*
- 5.97%
- 10Y*
- —
^GSPC
- 1D
- 0.50%
- 1M
- -0.17%
- YTD
- 8.56%
- 6M
- 8.85%
- 1Y
- 22.93%
- 3Y*
- 19.37%
- 5Y*
- 11.84%
- 10Y*
- 13.61%
FMDGX vs. ^GSPC - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | |
|---|---|---|---|---|---|---|---|---|
FMDGX Fidelity Mid Cap Growth Index Fund | 2.88% | 8.60% | 22.03% | 25.79% | -26.67% | 12.67% | 34.84% | 4.63% |
^GSPC S&P 500 Index | 8.56% | 16.39% | 23.31% | 24.23% | -19.44% | 26.89% | 16.26% | 7.55% |
Correlation
The correlation between FMDGX and ^GSPC is 0.81, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.81 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.85 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.88 |
Correlation (All Time) Calculated using the full available price history since Jul 17, 2019 | 0.87 |
The correlation between FMDGX and ^GSPC has been stable across timeframes, ranging from 0.81 to 0.88 - 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
FMDGX vs. ^GSPC — Risk / Return Rank
FMDGX
^GSPC
FMDGX vs. ^GSPC - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Fidelity Mid Cap Growth Index Fund (FMDGX) and S&P 500 Index (^GSPC). 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.
| FMDGX | ^GSPC | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.60 | ||
| Sortino ratioReturn per unit of downside risk | -2.04 | ||
| Omega ratioGain probability vs. loss probability | 1.06 | 1.34 | -0.28 |
| Calmar ratioReturn relative to maximum drawdown | 0.31 | 2.53 | -2.22 |
| Martin ratioReturn relative to average drawdown | 0.89 | 11.37 | -10.48 |
Loading charts...
Drawdowns
FMDGX vs. ^GSPC - Drawdown Comparison
The maximum FMDGX drawdown since its inception was -38.59%, smaller than the maximum ^GSPC drawdown of -56.78%. Use the drawdown chart below to compare losses from any high point for FMDGX and ^GSPC.
Loading charts...
Drawdown Indicators
| FMDGX | ^GSPC | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -38.59% | -56.78% | +18.19% |
Max Drawdown (1Y)Largest decline over 1 year | -14.75% | -9.10% | -5.65% |
Max Drawdown (3Y)Largest decline over 3 years | -25.30% | -18.90% | -6.40% |
Max Drawdown (5Y)Largest decline over 5 years | -38.59% | -25.43% | -13.16% |
Max Drawdown (10Y)Largest decline over 10 years | — | -33.92% | — |
Current DrawdownCurrent decline from peak | -2.97% | -2.34% | -0.63% |
Average DrawdownAverage peak-to-trough decline | -11.17% | -10.72% | -0.45% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 5.08% | 2.02% | +3.06% |
Volatility
FMDGX vs. ^GSPC - Volatility Comparison
Fidelity Mid Cap Growth Index Fund (FMDGX) has a higher volatility of 5.75% compared to S&P 500 Index (^GSPC) at 4.43%. This indicates that FMDGX's price experiences larger fluctuations and is considered to be riskier than ^GSPC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| FMDGX | ^GSPC | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.75% | 4.43% | +1.32% |
Volatility (6M)Calculated over the trailing 6-month period | 13.44% | 9.70% | +3.74% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.02% | 12.38% | +4.64% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 22.44% | 16.97% | +5.47% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 24.33% | 18.09% | +6.24% |
Frequently Asked Questions
FMDGX and ^GSPC have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
FMDGX has higher volatility (5.75%) compared to ^GSPC (4.43%). In terms of maximum drawdown, FMDGX dropped -38.59% vs ^GSPC's -56.78%.
^GSPC currently has the higher Sharpe Ratio (1.86 vs 0.27), 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 FMDGX and ^GSPC
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