OTCAX vs. NEEIX
OTCAX (MFS Mid Cap Growth Fund) and NEEIX (Needham Growth Fund Institutional Class) are both Mid Cap Growth Equities funds. Over the past 5 years, OTCAX returned 3.22%/yr vs 10.10%/yr for NEEIX. Their correlation of 0.82 means they have usually moved in the same direction. OTCAX charges 1.00%/yr vs 1.21%/yr for NEEIX.
Performance
OTCAX vs. NEEIX - 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 NEEIX's 34.81% return.
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%
NEEIX
- 1D
- 5.86%
- 1M
- -9.99%
- 6M
- 17.35%
- YTD
- 34.81%
- 1Y
- 52.00%
- 3Y*
- 18.86%
- 5Y*
- 10.10%
- 10Y*
- —
- ALL TIME*
- 14.98%
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. NEEIX - 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% |
NEEIX Needham Growth Fund Institutional Class | 34.81% | 9.32% | 19.26% | 27.30% | -33.26% | 28.13% | 42.39% | 43.15% | -10.13% | 8.47% |
Correlation
The correlation between OTCAX and NEEIX is 0.81, 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. | 0.81 |
Correlation (3Y) Balances recent behavior with more history. | 0.77 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.82 |
Correlation (All Time) Calculated using the full available price history since Jan 3, 2017 | 0.82 |
The correlation between OTCAX and NEEIX has been stable across timeframes, ranging from 0.77 to 0.82 - a consistent structural relationship.
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Return for Risk
OTCAX vs. NEEIX — Risk / Return Rank
OTCAX
NEEIX
OTCAX vs. NEEIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Mid Cap Growth Fund (OTCAX) and Needham Growth Fund Institutional Class (NEEIX). 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 | NEEIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.62 | ||
| Sortino ratioReturn per unit of downside risk | -2.07 | ||
| Omega ratioGain probability vs. loss probability | 0.99 | 1.25 | -0.26 |
| Calmar ratioReturn relative to maximum drawdown | -0.19 | 2.03 | -2.21 |
| Martin ratioReturn relative to average drawdown | -0.46 | 8.46 | -8.93 |
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Drawdowns
OTCAX vs. NEEIX - Drawdown Comparison
The maximum OTCAX drawdown since its inception was -74.39%, which is greater than NEEIX's maximum drawdown of -43.11%. Use the drawdown chart below to compare losses from any high point for OTCAX and NEEIX.
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Drawdown Indicators
| OTCAX | NEEIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -74.39% | -43.11% | -31.28% |
Max Drawdown (1Y)Largest decline over 1 year | -16.46% | -23.12% | +6.66% |
Max Drawdown (3Y)Largest decline over 3 years | -21.05% | -36.13% | +15.08% |
Max Drawdown (5Y)Largest decline over 5 years | -36.85% | -43.11% | +6.26% |
Max Drawdown (10Y)Largest decline over 10 years | -36.85% | — | — |
Current DrawdownCurrent decline from peak | -5.51% | -18.62% | +13.11% |
Average DrawdownAverage peak-to-trough decline | -23.03% | -10.82% | -12.21% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 6.60% | 5.66% | +0.94% |
Volatility
OTCAX vs. NEEIX - Volatility Comparison
The current volatility for MFS Mid Cap Growth Fund (OTCAX) is 4.82%, while Needham Growth Fund Institutional Class (NEEIX) has a volatility of 12.98%. This indicates that OTCAX experiences smaller price fluctuations and is considered to be less risky than NEEIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| OTCAX | NEEIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.82% | 12.98% | -8.16% |
Volatility (6M)Calculated over the trailing 6-month period | 14.58% | 26.84% | -12.26% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.73% | 32.46% | -14.73% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 20.39% | 29.43% | -9.04% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 20.02% | 26.32% | -6.30% |
OTCAX vs. NEEIX - Expense Ratio Comparison
OTCAX has a 1.00% expense ratio, which is lower than NEEIX's 1.21% expense ratio.
Dividends
OTCAX vs. NEEIX - Dividend Comparison
OTCAX's dividend yield for the trailing twelve months is around 16.40%, more than NEEIX's 5.31% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
NEEIX Needham Growth Fund Institutional Class | 5.31% | 7.16% | 7.48% | 0.00% | 1.72% | 6.70% | 5.58% | 11.09% | 17.58% | 9.64% | 0.00% | 0.00% |
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 NEEIX have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
NEEIX has higher volatility (12.98%) compared to OTCAX (4.82%). In terms of maximum drawdown, OTCAX dropped -74.39% vs NEEIX's -43.11%.
NEEIX currently has the higher Sharpe Ratio (1.44 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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