MVCKX vs. VIIIX
MVCKX (MFS Mid Cap Value Fund Class R6) and VIIIX (Vanguard Institutional Index Fund Institutional Plus Shares) are both mutual funds - MVCKX is a Mid Cap Value Equities fund actively managed by MFS, while VIIIX is a S&P 500 fund tracking the S&P 500 Index. MVCKX is actively managed, while VIIIX is passively managed. Over the past 10 years, MVCKX returned 9.80%/yr vs 15.07%/yr for VIIIX. Their correlation of 0.84 means they have usually moved in the same direction. MVCKX charges 0.62%/yr vs 0.02%/yr for VIIIX.
Performance
MVCKX vs. VIIIX - Performance Comparison
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Returns By Period
In the year-to-date period, MVCKX achieves a 15.30% return, which is significantly higher than VIIIX's 9.35% return. Over the past 10 years, MVCKX has underperformed VIIIX with an annualized return of 9.80%, while VIIIX has yielded a comparatively higher 15.07% annualized return.
MVCKX
- 1D
- -0.44%
- 1M
- 1.46%
- 6M
- 11.03%
- YTD
- 15.30%
- 1Y
- 21.61%
- 3Y*
- 10.59%
- 5Y*
- 8.13%
- 10Y*
- 9.80%
- ALL TIME*
- 9.31%
VIIIX
- 1D
- 1.66%
- 1M
- -0.56%
- 6M
- 7.79%
- YTD
- 9.35%
- 1Y
- 20.63%
- 3Y*
- 19.44%
- 5Y*
- 12.83%
- 10Y*
- 15.07%
- ALL TIME*
- 9.41%
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 |
MVCKX vs. VIIIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
MVCKX MFS Mid Cap Value Fund Class R6 | 15.30% | 6.47% | 6.80% | 12.92% | -8.62% | 30.93% | 4.40% | 31.11% | -11.35% | 13.83% |
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares | 9.35% | 17.87% | 26.29% | 25.79% | -18.14% | 28.69% | 18.41% | 31.48% | -4.41% | 21.82% |
Correlation
The correlation between MVCKX and VIIIX is 0.62, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.62 |
Correlation (3Y) Balances recent behavior with more history. | 0.71 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.80 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.82 |
Correlation (All Time) Calculated using the full available price history since Jan 2, 2014 | 0.84 |
Over the past year, the correlation between MVCKX and VIIIX has dropped to 0.62 - well below their long-term average of 0.84, suggesting their price drivers have been diverging.
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Return for Risk
MVCKX vs. VIIIX — Risk / Return Rank
MVCKX
VIIIX
MVCKX vs. VIIIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Mid Cap Value Fund Class R6 (MVCKX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX). 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.
| MVCKX | VIIIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.04 | ||
| Sortino ratioReturn per unit of downside risk | +0.21 | ||
| Omega ratioGain probability vs. loss probability | 1.26 | 1.26 | 0.00 |
| Calmar ratioReturn relative to maximum drawdown | 2.11 | 2.06 | +0.04 |
| Martin ratioReturn relative to average drawdown | 7.33 | 8.86 | -1.52 |
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Drawdowns
MVCKX vs. VIIIX - Drawdown Comparison
The maximum MVCKX drawdown since its inception was -42.75%, smaller than the maximum VIIIX drawdown of -55.18%. Use the drawdown chart below to compare losses from any high point for MVCKX and VIIIX.
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Drawdown Indicators
| MVCKX | VIIIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -42.75% | -55.18% | +12.43% |
Max Drawdown (1Y)Largest decline over 1 year | -9.36% | -8.90% | -0.46% |
Max Drawdown (3Y)Largest decline over 3 years | -25.96% | -18.75% | -7.21% |
Max Drawdown (5Y)Largest decline over 5 years | -25.96% | -24.50% | -1.46% |
Max Drawdown (10Y)Largest decline over 10 years | -42.75% | -33.79% | -8.96% |
Current DrawdownCurrent decline from peak | -1.37% | -2.11% | +0.74% |
Average DrawdownAverage peak-to-trough decline | -5.21% | -9.97% | +4.76% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.69% | 2.07% | +0.62% |
Volatility
MVCKX vs. VIIIX - Volatility Comparison
MFS Mid Cap Value Fund Class R6 (MVCKX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) have volatilities of 3.35% and 3.44%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| MVCKX | VIIIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 3.35% | 3.44% | -0.09% |
Volatility (6M)Calculated over the trailing 6-month period | 9.74% | 10.09% | -0.35% |
Volatility (1Y)Calculated over the trailing 1-year period | 13.46% | 12.86% | +0.60% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 17.45% | 17.01% | +0.44% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 19.32% | 18.07% | +1.25% |
MVCKX vs. VIIIX - Expense Ratio Comparison
MVCKX has a 0.62% expense ratio, which is higher than VIIIX's 0.02% expense ratio.
Dividends
MVCKX vs. VIIIX - Dividend Comparison
MVCKX's dividend yield for the trailing twelve months is around 7.17%, more than VIIIX's 2.51% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MVCKX MFS Mid Cap Value Fund Class R6 | 7.17% | 8.27% | 3.87% | 3.00% | 5.44% | 5.88% | 1.12% | 2.32% | 6.65% | 3.68% | 0.06% | 4.87% |
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares | 2.51% | 2.11% | 3.66% | 2.66% | 3.39% | 4.79% | 3.07% | 2.86% | 2.45% | 1.84% | 2.38% | 2.47% |
Frequently Asked Questions
MVCKX and VIIIX have a correlation of 0.62, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
VIIIX has higher volatility (3.44%) compared to MVCKX (3.35%). In terms of maximum drawdown, MVCKX dropped -42.75% vs VIIIX's -55.18%.
MVCKX currently has the higher Sharpe Ratio (1.47 vs 1.43), 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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