FSGEX vs. MDIZX

Last updated Jun 4, 2026

FSGEX (Fidelity Series Global ex U.S. Index Fund) and MDIZX (MFS International Diversification Fund R6) are both Foreign Large Cap Equities funds. Over the past 5 years, FSGEX returned 9.06%/yr vs 7.33%/yr for MDIZX. With a 0.96 correlation, they move nearly in lockstep. FSGEX charges 0.01%/yr vs 0.73%/yr for MDIZX.

Performance

FSGEX vs. MDIZX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Series Global ex U.S. Index Fund (FSGEX) and MFS International Diversification Fund R6 (MDIZX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FSGEX achieves a 15.85% return, which is significantly higher than MDIZX's 10.30% return.

FSGEX

• 1D: 0.76%
• 1M: 6.16%
• YTD: 15.85%
• 6M: 18.73%
• 1Y: 33.95%
• 3Y*: 20.16%
• 5Y*: 9.06%
• 10Y*: 9.96%

MDIZX

• 1D: 0.62%
• 1M: 4.50%
• YTD: 10.30%
• 6M: 12.32%
• 1Y: 23.03%
• 3Y*: 16.46%
• 5Y*: 7.33%
• 10Y*: —

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

FSGEX vs. MDIZX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FSGEX Fidelity Series Global ex U.S. Index Fund	15.85%	32.99%	5.34%	15.56%	-15.75%	7.77%	10.75%	21.41%	-13.99%	2.76%
MDIZX MFS International Diversification Fund R6	10.30%	27.99%	6.52%	14.48%	-17.04%	7.79%	15.45%	26.09%	-10.93%	3.71%

Correlation

The correlation between FSGEX and MDIZX is 0.93, 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	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.96
Correlation (All Time) Calculated using the full available price history since Oct 20, 2017	0.96

The correlation between FSGEX and MDIZX has been stable across timeframes, ranging from 0.93 to 0.96 - a consistent structural relationship.

Return for Risk

FSGEX vs. MDIZX — Risk / Return Rank

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

FSGEX

FSGEX Risk / Return Rank: 59
FSGEX Sharpe Ratio Rank: 62
FSGEX Sortino Ratio Rank: 55
FSGEX Omega Ratio Rank: 59
FSGEX Calmar Ratio Rank: 60
FSGEX Martin Ratio Rank: 58

MDIZX

MDIZX Risk / Return Rank: 35
MDIZX Sharpe Ratio Rank: 38
MDIZX Sortino Ratio Rank: 37
MDIZX Omega Ratio Rank: 39
MDIZX Calmar Ratio Rank: 28
MDIZX Martin Ratio Rank: 33

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.

FSGEX vs. MDIZX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Series Global ex U.S. Index Fund (FSGEX) and MFS International Diversification Fund R6 (MDIZX). 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.

	FSGEX	MDIZX	Difference
Sharpe ratio: Return per unit of total volatility	2.31	1.81	+0.50
Sortino ratio: Return per unit of downside risk	3.13	2.56	+0.57
Omega ratio: Gain probability vs. loss probability	1.43	1.34	+0.09
Calmar ratio: Return relative to maximum drawdown	2.98	1.98	+1.00
Martin ratio: Return relative to average drawdown	11.69	7.50	+4.18
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FSGEX vs. MDIZX - Sharpe Ratio Comparison

The current FSGEX Sharpe Ratio is 2.31, which is comparable to the MDIZX Sharpe Ratio of 1.81. The chart below compares the historical Sharpe Ratios of FSGEX and MDIZX, 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

	FSGEX	MDIZX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.31	1.81	+0.50
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.59	0.52	+0.07
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.62	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.42	0.58	-0.17

Drawdowns

FSGEX vs. MDIZX - Drawdown Comparison

The maximum FSGEX drawdown since its inception was -34.74%, which is greater than MDIZX's maximum drawdown of -30.09%. Use the drawdown chart below to compare losses from any high point for FSGEX and MDIZX.

Drawdown Indicators

	FSGEX	MDIZX	Difference
Max Drawdown Largest peak-to-trough decline	-34.74%	-30.09%	-4.65%
Max Drawdown (1Y) Largest decline over 1 year	-11.24%	-11.36%	+0.12%
Max Drawdown (3Y) Largest decline over 3 years	-13.34%	-12.59%	-0.75%
Max Drawdown (5Y) Largest decline over 5 years	-29.66%	-30.09%	+0.43%
Max Drawdown (10Y) Largest decline over 10 years	-34.74%	—	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-8.45%	-6.70%	-1.75%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.86%	3.00%	-0.14%

Volatility

FSGEX vs. MDIZX - Volatility Comparison

Fidelity Series Global ex U.S. Index Fund (FSGEX) has a higher volatility of 4.95% compared to MFS International Diversification Fund R6 (MDIZX) at 3.98%. This indicates that FSGEX's price experiences larger fluctuations and is considered to be riskier than MDIZX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FSGEX	MDIZX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.95%	3.98%	+0.97%
Volatility (6M) Calculated over the trailing 6-month period	12.28%	10.15%	+2.13%
Volatility (1Y) Calculated over the trailing 1-year period	14.56%	12.49%	+2.07%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.40%	14.22%	+1.18%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.22%	15.20%	+1.02%

FSGEX vs. MDIZX - Expense Ratio Comparison

FSGEX has a 0.01% expense ratio, which is lower than MDIZX's 0.73% expense ratio.

Dividends

FSGEX vs. MDIZX - Dividend Comparison

FSGEX's dividend yield for the trailing twelve months is around 2.61%, less than MDIZX's 4.77% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSGEX Fidelity Series Global ex U.S. Index Fund	2.61%	3.02%	2.98%	2.90%	2.78%	2.59%	1.68%	2.10%	2.86%	2.48%	2.56%	2.61%
MDIZX MFS International Diversification Fund R6	4.77%	5.26%	3.61%	4.24%	2.76%	2.79%	1.72%	2.57%	3.23%	1.66%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FSGEX and MDIZX in my portfolio?

With a correlation of 0.93, FSGEX and MDIZX 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.

Which is riskier, FSGEX or MDIZX?

FSGEX has higher volatility (4.95%) compared to MDIZX (3.98%). In terms of maximum drawdown, FSGEX dropped -34.74% vs MDIZX's -30.09%.

Which has better risk-adjusted returns?

FSGEX currently has the higher Sharpe Ratio (2.31 vs 1.81), 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.