MDIZX vs. FSPSX
MDIZX (MFS International Diversification Fund R6) and FSPSX (Fidelity International Index Fund) are both Foreign Large Cap Equities funds - MDIZX tracks the MSCI All Country World (ex-US) Index (net div) while FSPSX tracks the MSCI EAFE Index. Both are passively managed. Over the past 5 years, MDIZX returned 7.80%/yr vs 9.51%/yr for FSPSX. Their correlation of 0.95 means they have usually moved in the same direction. MDIZX charges 0.73%/yr vs 0.04%/yr for FSPSX.
Performance
MDIZX vs. FSPSX - Performance Comparison
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Returns By Period
The year-to-date returns for both investments are quite close, with MDIZX having a 11.41% return and FSPSX slightly higher at 11.79%.
MDIZX
- 1D
- 2.59%
- 1M
- 1.91%
- 6M
- 5.99%
- YTD
- 11.41%
- 1Y
- 23.05%
- 3Y*
- 15.29%
- 5Y*
- 7.80%
- 10Y*
- —
- ALL TIME*
- 8.77%
FSPSX
- 1D
- -0.69%
- 1M
- 1.28%
- 6M
- 5.82%
- YTD
- 11.79%
- 1Y
- 25.41%
- 3Y*
- 16.63%
- 5Y*
- 9.51%
- 10Y*
- 9.66%
- ALL TIME*
- 8.23%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
MDIZX vs. FSPSX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MDIZX MFS International Diversification Fund R6 | 11.41% | 27.99% | 6.52% | 14.48% | -17.04% | 7.79% | 15.45% | 26.09% | -10.93% | 3.71% |
FSPSX Fidelity International Index Fund | 11.79% | 31.98% | 3.70% | 18.31% | -14.23% | 11.45% | 8.16% | 22.03% | -13.55% | 2.35% |
Correlation
The correlation between MDIZX and FSPSX is 0.92, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.92 |
Correlation (3Y) Balances recent behavior with more history. | 0.93 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.95 |
Correlation (All Time) Calculated using the full available price history since Oct 19, 2017 | 0.95 |
The correlation between MDIZX and FSPSX has been stable across timeframes, ranging from 0.92 to 0.95 - a consistent structural relationship.
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Return for Risk
MDIZX vs. FSPSX — Risk / Return Rank
MDIZX
FSPSX
MDIZX vs. FSPSX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS International Diversification Fund R6 (MDIZX) and Fidelity International Index Fund (FSPSX). 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.
| MDIZX | FSPSX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.08 | ||
| Sortino ratioReturn per unit of downside risk | -0.13 | ||
| Omega ratioGain probability vs. loss probability | 1.29 | 1.30 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | 1.87 | 2.24 | -0.36 |
| Martin ratioReturn relative to average drawdown | 7.01 | 8.48 | -1.47 |
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Drawdowns
MDIZX vs. FSPSX - Drawdown Comparison
The maximum MDIZX drawdown since its inception was -30.09%, smaller than the maximum FSPSX drawdown of -33.69%. Use the drawdown chart below to compare losses from any high point for MDIZX and FSPSX.
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Drawdown Indicators
| MDIZX | FSPSX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -30.09% | -33.69% | +3.60% |
Max Drawdown (1Y)Largest decline over 1 year | -11.36% | -11.39% | +0.03% |
Max Drawdown (3Y)Largest decline over 3 years | -12.59% | -13.58% | +0.99% |
Max Drawdown (5Y)Largest decline over 5 years | -30.09% | -29.41% | -0.68% |
Max Drawdown (10Y)Largest decline over 10 years | — | -33.69% | — |
Current DrawdownCurrent decline from peak | 0.00% | -0.69% | +0.69% |
Average DrawdownAverage peak-to-trough decline | -6.60% | -6.49% | -0.11% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.03% | 3.00% | +0.03% |
Volatility
MDIZX vs. FSPSX - Volatility Comparison
The current volatility for MFS International Diversification Fund R6 (MDIZX) is 4.12%, while Fidelity International Index Fund (FSPSX) has a volatility of 4.45%. This indicates that MDIZX experiences smaller price fluctuations and is considered to be less risky than FSPSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MDIZX | FSPSX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.12% | 4.45% | -0.33% |
Volatility (6M)Calculated over the trailing 6-month period | 11.68% | 13.23% | -1.55% |
Volatility (1Y)Calculated over the trailing 1-year period | 13.57% | 15.50% | -1.93% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 14.42% | 16.11% | -1.69% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 15.22% | 16.29% | -1.07% |
MDIZX vs. FSPSX - Expense Ratio Comparison
MDIZX has a 0.73% expense ratio, which is higher than FSPSX's 0.04% expense ratio.
Dividends
MDIZX vs. FSPSX - Dividend Comparison
MDIZX's dividend yield for the trailing twelve months is around 4.72%, more than FSPSX's 2.82% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FSPSX Fidelity International Index Fund | 2.82% | 3.15% | 3.27% | 2.79% | 2.66% | 3.07% | 1.84% | 3.18% | 2.79% | 2.50% | 3.08% | 2.79% |
MDIZX MFS International Diversification Fund R6 | 4.72% | 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
With a correlation of 0.92, MDIZX and FSPSX 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.
FSPSX has higher volatility (4.45%) compared to MDIZX (4.12%). In terms of maximum drawdown, MDIZX dropped -30.09% vs FSPSX's -33.69%.
FSPSX currently has the higher Sharpe Ratio (1.65 vs 1.57), 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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