FSGGX vs. FSMDX

Last updated Jun 13, 2026

FSGGX (Fidelity Global ex U.S. Index Fund) and FSMDX (Fidelity Mid Cap Index Fund) are both mutual funds - FSGGX is a Foreign Large Cap Equities fund tracking the MSCI ACWI ex USA Index, while FSMDX is a Mid Cap Blend Equities fund tracking the Russell Midcap Index. Both are passively managed. Over the past 10 years, FSGGX returned 9.60%/yr vs 11.76%/yr for FSMDX. A 0.76 correlation means they provide meaningful diversification when combined. FSGGX charges 0.06%/yr vs 0.03%/yr for FSMDX.

Performance

FSGGX vs. FSMDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Global ex U.S. Index Fund (FSGGX) and Fidelity Mid Cap Index Fund (FSMDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FSGGX achieves a 13.45% return, which is significantly higher than FSMDX's 12.29% return. Over the past 10 years, FSGGX has underperformed FSMDX with an annualized return of 9.60%, while FSMDX has yielded a comparatively higher 11.76% annualized return.

FSGGX

• 1D: 3.42%
• 1M: 2.92%
• YTD: 13.45%
• 6M: 15.37%
• 1Y: 29.76%
• 3Y*: 18.85%
• 5Y*: 8.42%
• 10Y*: 9.60%

FSMDX

• 1D: 2.24%
• 1M: 3.96%
• YTD: 12.29%
• 6M: 11.02%
• 1Y: 22.43%
• 3Y*: 16.72%
• 5Y*: 8.00%
• 10Y*: 11.76%

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

FSGGX vs. FSMDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FSGGX Fidelity Global ex U.S. Index Fund	13.45%	32.93%	5.30%	15.57%	-15.75%	7.74%	10.73%	21.36%	-13.93%	24.73%
FSMDX Fidelity Mid Cap Index Fund	12.29%	10.58%	15.55%	17.20%	-17.27%	22.56%	17.13%	30.53%	-9.38%	18.04%

Correlation

The correlation between FSGGX and FSMDX is 0.73, 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	0.73
Correlation (3Y) Calculated over the trailing 3-year period	0.72
Correlation (5Y) Calculated over the trailing 5-year period	0.76
Correlation (10Y) Calculated over the trailing 10-year period	0.75
Correlation (All Time) Calculated using the full available price history since Sep 9, 2011	0.76

The correlation between FSGGX and FSMDX has been stable across timeframes, ranging from 0.72 to 0.76 - a consistent structural relationship.

Return for Risk

FSGGX vs. FSMDX — Risk / Return Rank

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

FSGGX

FSGGX Risk / Return Rank: 65
FSGGX Sharpe Ratio Rank: 66
FSGGX Sortino Ratio Rank: 62
FSGGX Omega Ratio Rank: 66
FSGGX Calmar Ratio Rank: 68
FSGGX Martin Ratio Rank: 64

FSMDX

FSMDX Risk / Return Rank: 52
FSMDX Sharpe Ratio Rank: 44
FSMDX Sortino Ratio Rank: 45
FSMDX Omega Ratio Rank: 40
FSMDX Calmar Ratio Rank: 68
FSMDX Martin Ratio Rank: 64

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.

FSGGX vs. FSMDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Global ex U.S. Index Fund (FSGGX) 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.

	FSGGX	FSMDX	Difference
Sharpe ratio: Return per unit of total volatility	1.86	1.53	+0.34
Sortino ratio: Return per unit of downside risk	2.55	2.20	+0.34
Omega ratio: Gain probability vs. loss probability	1.35	1.27	+0.08
Calmar ratio: Return relative to maximum drawdown	2.57	2.58	-0.01
Martin ratio: Return relative to average drawdown	9.88	9.88	0.00

FSGGX vs. FSMDX - Sharpe Ratio Comparison

The current FSGGX Sharpe Ratio is 1.86, which is comparable to the FSMDX Sharpe Ratio of 1.53. The chart below compares the historical Sharpe Ratios of FSGGX and FSMDX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

FSGGX vs. FSMDX - Drawdown Comparison

The maximum FSGGX drawdown since its inception was -34.76%, smaller than the maximum FSMDX drawdown of -40.35%. Use the drawdown chart below to compare losses from any high point for FSGGX and FSMDX.

Drawdown Indicators

	FSGGX	FSMDX	Difference
Max Drawdown Largest peak-to-trough decline	-34.76%	-40.35%	+5.59%
Max Drawdown (1Y) Largest decline over 1 year	-11.26%	-8.16%	-3.10%
Max Drawdown (3Y) Largest decline over 3 years	-13.31%	-20.92%	+7.61%
Max Drawdown (5Y) Largest decline over 5 years	-29.53%	-26.07%	-3.46%
Max Drawdown (10Y) Largest decline over 10 years	-34.76%	-40.35%	+5.59%
Current Drawdown Current decline from peak	-2.08%	-0.67%	-1.41%
Average Drawdown Average peak-to-trough decline	-7.33%	-4.95%	-2.38%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.93%	2.13%	+0.80%

Volatility

FSGGX vs. FSMDX - Volatility Comparison

Fidelity Global ex U.S. Index Fund (FSGGX) has a higher volatility of 6.77% compared to Fidelity Mid Cap Index Fund (FSMDX) at 4.48%. This indicates that FSGGX's price experiences larger fluctuations and is considered to be riskier than FSMDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FSGGX	FSMDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.77%	4.48%	+2.29%
Volatility (6M) Calculated over the trailing 6-month period	13.49%	10.46%	+3.03%
Volatility (1Y) Calculated over the trailing 1-year period	15.54%	13.80%	+1.74%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.55%	18.32%	-2.77%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.25%	19.34%	-3.09%

FSGGX vs. FSMDX - Expense Ratio Comparison

FSGGX 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

FSGGX vs. FSMDX - Dividend Comparison

FSGGX's dividend yield for the trailing twelve months is around 2.38%, more than FSMDX's 0.98% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSGGX Fidelity Global ex U.S. Index Fund	2.38%	2.70%	2.91%	2.95%	2.64%	2.60%	1.71%	2.85%	2.66%	0.22%	0.05%	2.44%
FSMDX Fidelity Mid Cap Index Fund	0.98%	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

Can I hold both FSGGX and FSMDX in my portfolio?

FSGGX and FSMDX have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FSGGX or FSMDX?

FSGGX has higher volatility (6.77%) compared to FSMDX (4.48%). In terms of maximum drawdown, FSGGX dropped -34.76% vs FSMDX's -40.35%.

Which has better risk-adjusted returns?

FSGGX currently has the higher Sharpe Ratio (1.86 vs 1.53), 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.