MCVIX vs. FSMDX

Last updated Jul 3, 2026

MCVIX (MFS Mid Cap Value Fund Class I) and FSMDX (Fidelity Mid Cap Index Fund) are both mutual funds - MCVIX is a Mid Cap Value Equities fund actively managed by MFS, while FSMDX is a Mid Cap Blend Equities fund tracking the Russell Midcap Index. MCVIX is actively managed, while FSMDX is passively managed. Over the past 10 years, MCVIX returned 10.49%/yr vs 11.89%/yr for FSMDX. With a 0.95 correlation, they move nearly in lockstep. MCVIX charges 0.72%/yr vs 0.03%/yr for FSMDX.

Performance

MCVIX vs. FSMDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in MFS Mid Cap Value Fund Class I (MCVIX) 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, MCVIX achieves a 12.76% return, which is significantly lower than FSMDX's 15.11% return. Over the past 10 years, MCVIX has underperformed FSMDX with an annualized return of 10.49%, while FSMDX has yielded a comparatively higher 11.89% annualized return.

MCVIX

• 1D: -0.17%
• 1M: 3.47%
• 6M: 12.76%
• YTD: 12.76%
• 1Y: 16.80%
• 3Y*: 13.23%
• 5Y*: 8.89%
• 10Y*: 10.49%

FSMDX

• 1D: -0.16%
• 1M: 2.06%
• 6M: 15.11%
• YTD: 15.11%
• 1Y: 19.91%
• 3Y*: 16.51%
• 5Y*: 8.34%
• 10Y*: 11.89%

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

MCVIX vs. FSMDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
MCVIX MFS Mid Cap Value Fund Class I	12.76%	6.33%	13.88%	12.80%	-8.74%	30.79%	4.27%	30.87%	-11.48%	13.67%
FSMDX Fidelity Mid Cap Index Fund	15.11%	10.58%	15.55%	17.20%	-17.27%	22.56%	17.13%	30.53%	-9.38%	18.04%

Correlation

The correlation between MCVIX and FSMDX is 0.94, 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	0.94
Correlation (3Y) Calculated over the trailing 3-year period	0.95
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.94
Correlation (All Time) Calculated using the full available price history since Sep 9, 2011	0.95

The correlation between MCVIX and FSMDX has been stable across timeframes, ranging from 0.94 to 0.95 - a consistent structural relationship.

Return for Risk

MCVIX vs. FSMDX — Risk / Return Rank

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

MCVIX

MCVIX Risk / Return Rank: 35
MCVIX Sharpe Ratio Rank: 34
MCVIX Sortino Ratio Rank: 36
MCVIX Omega Ratio Rank: 32
MCVIX Calmar Ratio Rank: 38
MCVIX Martin Ratio Rank: 36

FSMDX

FSMDX Risk / Return Rank: 48
FSMDX Sharpe Ratio Rank: 40
FSMDX Sortino Ratio Rank: 41
FSMDX Omega Ratio Rank: 37
FSMDX Calmar Ratio Rank: 62
FSMDX Martin Ratio Rank: 59

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.

MCVIX vs. FSMDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for MFS Mid Cap Value Fund Class I (MCVIX) 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.

	MCVIX	FSMDX	Difference
Sharpe ratio: Return per unit of total volatility	1.31	1.50	-0.19
Sortino ratio: Return per unit of downside risk	1.97	2.17	-0.20
Omega ratio: Gain probability vs. loss probability	1.23	1.26	-0.03
Calmar ratio: Return relative to maximum drawdown	1.88	2.53	-0.66
Martin ratio: Return relative to average drawdown	6.45	9.68	-3.24

MCVIX vs. FSMDX - Sharpe Ratio Comparison

The current MCVIX Sharpe Ratio is 1.31, which is comparable to the FSMDX Sharpe Ratio of 1.50. The chart below compares the historical Sharpe Ratios of MCVIX 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

MCVIX vs. FSMDX - Drawdown Comparison

The maximum MCVIX drawdown since its inception was -59.64%, which is greater than FSMDX's maximum drawdown of -40.35%. Use the drawdown chart below to compare losses from any high point for MCVIX and FSMDX.

Drawdown Indicators

	MCVIX	FSMDX	Difference
Max Drawdown Largest peak-to-trough decline	-59.64%	-40.35%	-19.29%
Max Drawdown (1Y) Largest decline over 1 year	-9.38%	-8.16%	-1.22%
Max Drawdown (3Y) Largest decline over 3 years	-21.01%	-20.92%	-0.09%
Max Drawdown (5Y) Largest decline over 5 years	-21.01%	-26.07%	+5.06%
Max Drawdown (10Y) Largest decline over 10 years	-42.79%	-40.35%	-2.44%
Current Drawdown Current decline from peak	-0.20%	-0.16%	-0.04%
Average Drawdown Average peak-to-trough decline	-7.87%	-4.93%	-2.94%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.73%	2.13%	+0.60%

Volatility

MCVIX vs. FSMDX - Volatility Comparison

The current volatility for MFS Mid Cap Value Fund Class I (MCVIX) is 3.86%, while Fidelity Mid Cap Index Fund (FSMDX) has a volatility of 4.72%. This indicates that MCVIX experiences smaller price fluctuations and is considered to be less risky than FSMDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MCVIX	FSMDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.86%	4.72%	-0.86%
Volatility (6M) Calculated over the trailing 6-month period	9.95%	10.57%	-0.62%
Volatility (1Y) Calculated over the trailing 1-year period	13.53%	13.84%	-0.31%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.23%	18.33%	-1.10%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.18%	19.28%	-0.10%

MCVIX vs. FSMDX - Expense Ratio Comparison

MCVIX has a 0.72% expense ratio, which is higher than FSMDX's 0.03% expense ratio.

Dividends

MCVIX vs. FSMDX - Dividend Comparison

MCVIX's dividend yield for the trailing twelve months is around 7.24%, more than FSMDX's 0.76% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSMDX Fidelity Mid Cap Index Fund	0.76%	1.10%	2.46%	1.39%	2.07%	3.35%	2.34%	2.86%	2.21%	2.17%	2.23%	2.84%
MCVIX MFS Mid Cap Value Fund Class I	7.24%	8.16%	10.88%	2.88%	5.32%	5.78%	0.99%	2.20%	6.49%	3.53%	0.06%	4.74%

Frequently Asked Questions

Can I hold both MCVIX and FSMDX in my portfolio?

With a correlation of 0.94, MCVIX and FSMDX 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, MCVIX or FSMDX?

FSMDX has higher volatility (4.72%) compared to MCVIX (3.86%). In terms of maximum drawdown, MCVIX dropped -59.64% vs FSMDX's -40.35%.

Which has better risk-adjusted returns?

FSMDX currently has the higher Sharpe Ratio (1.50 vs 1.31), 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.