OTCAX vs. FSMDX
OTCAX (MFS Mid Cap Growth Fund) and FSMDX (Fidelity Mid Cap Index Fund) are both mutual funds - OTCAX is a Mid Cap Growth Equities fund managed by MFS, while FSMDX is a Mid Cap Blend Equities fund tracking the Russell Midcap Index. Over the past 10 years, OTCAX returned 11.54%/yr vs 11.45%/yr for FSMDX. Their correlation of 0.90 means they have usually moved in the same direction. OTCAX charges 1.00%/yr vs 0.03%/yr for FSMDX.
Performance
OTCAX vs. FSMDX - Performance Comparison
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Returns By Period
In the year-to-date period, OTCAX achieves a 2.18% return, which is significantly lower than FSMDX's 14.95% return. Both investments have delivered pretty close results over the past 10 years, with OTCAX having a 11.54% annualized return and FSMDX not far behind at 11.45%.
OTCAX
- 1D
- 2.10%
- 1M
- -3.22%
- 6M
- 2.83%
- YTD
- 2.18%
- 1Y
- -1.26%
- 3Y*
- 11.20%
- 5Y*
- 3.22%
- 10Y*
- 11.54%
- ALL TIME*
- 8.63%
FSMDX
- 1D
- 0.35%
- 1M
- -0.33%
- 6M
- 11.53%
- YTD
- 14.95%
- 1Y
- 20.72%
- 3Y*
- 14.95%
- 5Y*
- 8.30%
- 10Y*
- 11.45%
- ALL TIME*
- 12.64%
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 |
OTCAX vs. FSMDX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
OTCAX MFS Mid Cap Growth Fund | 2.18% | 3.32% | 23.47% | 21.00% | -28.53% | 13.66% | 35.34% | 37.43% | 0.82% | 25.95% |
FSMDX Fidelity Mid Cap Index Fund | 14.95% | 10.58% | 15.55% | 17.20% | -17.27% | 22.56% | 17.13% | 30.53% | -9.38% | 18.04% |
Correlation
The correlation between OTCAX and FSMDX is 0.84, 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. | 0.84 |
Correlation (3Y) Balances recent behavior with more history. | 0.85 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.89 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.88 |
Correlation (All Time) Calculated using the full available price history since Sep 9, 2011 | 0.90 |
The correlation between OTCAX and FSMDX has been stable across timeframes, ranging from 0.84 to 0.90 - a consistent structural relationship.
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Return for Risk
OTCAX vs. FSMDX — Risk / Return Rank
OTCAX
FSMDX
OTCAX vs. FSMDX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Mid Cap Growth Fund (OTCAX) 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.
| OTCAX | FSMDX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.51 | ||
| Sortino ratioReturn per unit of downside risk | -2.09 | ||
| Omega ratioGain probability vs. loss probability | 0.99 | 1.24 | -0.25 |
| Calmar ratioReturn relative to maximum drawdown | -0.19 | 2.25 | -2.43 |
| Martin ratioReturn relative to average drawdown | -0.46 | 8.71 | -9.17 |
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Drawdowns
OTCAX vs. FSMDX - Drawdown Comparison
The maximum OTCAX drawdown since its inception was -74.39%, which is greater than FSMDX's maximum drawdown of -40.35%. Use the drawdown chart below to compare losses from any high point for OTCAX and FSMDX.
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Drawdown Indicators
| OTCAX | FSMDX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -74.39% | -40.35% | -34.04% |
Max Drawdown (1Y)Largest decline over 1 year | -16.46% | -8.16% | -8.30% |
Max Drawdown (3Y)Largest decline over 3 years | -21.05% | -20.92% | -0.13% |
Max Drawdown (5Y)Largest decline over 5 years | -36.85% | -26.07% | -10.78% |
Max Drawdown (10Y)Largest decline over 10 years | -36.85% | -40.35% | +3.50% |
Current DrawdownCurrent decline from peak | -5.51% | -0.66% | -4.85% |
Average DrawdownAverage peak-to-trough decline | -23.03% | -4.91% | -18.12% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 6.60% | 2.11% | +4.49% |
Volatility
OTCAX vs. FSMDX - Volatility Comparison
MFS Mid Cap Growth Fund (OTCAX) has a higher volatility of 4.82% compared to Fidelity Mid Cap Index Fund (FSMDX) at 2.42%. This indicates that OTCAX'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.
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Volatility by Period
| OTCAX | FSMDX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.82% | 2.42% | +2.40% |
Volatility (6M)Calculated over the trailing 6-month period | 14.58% | 10.22% | +4.36% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.73% | 13.71% | +4.02% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 20.39% | 18.26% | +2.13% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 20.02% | 19.27% | +0.75% |
OTCAX vs. FSMDX - Expense Ratio Comparison
OTCAX has a 1.00% expense ratio, which is higher than FSMDX's 0.03% expense ratio.
Dividends
OTCAX vs. FSMDX - Dividend Comparison
OTCAX's dividend yield for the trailing twelve months is around 16.40%, 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% |
OTCAX MFS Mid Cap Growth Fund | 16.40% | 16.76% | 15.59% | 0.00% | 0.00% | 3.64% | 0.83% | 0.86% | 4.70% | 8.80% | 5.67% | 2.84% |
Frequently Asked Questions
OTCAX and FSMDX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
OTCAX has higher volatility (4.82%) compared to FSMDX (2.42%). In terms of maximum drawdown, OTCAX dropped -74.39% vs FSMDX's -40.35%.
FSMDX currently has the higher Sharpe Ratio (1.34 vs -0.17), 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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