MMID vs. VO
MMID (MFS Active Mid Cap ETF) and VO (Vanguard Mid-Cap ETF) are both Mid Cap Blend Equities funds. MMID is actively managed, while VO is passively managed. Their correlation of 0.83 suggests significant overlap in exposure. MMID charges 0.59%/yr vs 0.03%/yr for VO.
Performance
MMID vs. VO - Performance Comparison
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Returns By Period
In the year-to-date period, MMID achieves a 6.73% return, which is significantly lower than VO's 11.87% return.
MMID
- 1D
- 1.25%
- 1M
- 2.13%
- 6M
- 2.59%
- YTD
- 6.73%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
VO
- 1D
- 0.20%
- 1M
- 0.27%
- 6M
- 7.77%
- YTD
- 11.87%
- 1Y
- 16.46%
- 3Y*
- 14.33%
- 5Y*
- 8.32%
- 10Y*
- 11.40%
MMID vs. VO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
MMID MFS Active Mid Cap ETF | 6.73% | 0.62% |
VO Vanguard Mid-Cap ETF | 11.87% | 0.03% |
Correlation
The correlation between MMID and VO is 0.83, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Sep 24, 2025 | 0.83 |
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Return for Risk
MMID vs. VO — Risk / Return Rank
MMID
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
VO
MMID vs. VO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Active Mid Cap ETF (MMID) and Vanguard Mid-Cap ETF (VO). 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.
| MMID | VO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | — | 1.23 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 2.02 | — |
| Martin ratioReturn relative to average drawdown | — | 7.64 | — |
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Drawdowns
MMID vs. VO - Drawdown Comparison
The maximum MMID drawdown since its inception was -7.93%, smaller than the maximum VO drawdown of -58.87%. Use the drawdown chart below to compare losses from any high point for MMID and VO.
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Drawdown Indicators
| MMID | VO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -7.93% | -58.87% | +50.94% |
Max Drawdown (1Y)Largest decline over 1 year | — | -8.17% | — |
Max Drawdown (3Y)Largest decline over 3 years | — | -19.02% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -27.57% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -39.37% | — |
Current DrawdownCurrent decline from peak | 0.00% | -0.41% | +0.41% |
Average DrawdownAverage peak-to-trough decline | -1.96% | -7.82% | +5.86% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 2.16% | — |
Volatility
MMID vs. VO - Volatility Comparison
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Volatility by Period
| MMID | VO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | — | 2.56% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 9.62% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 13.30% | 12.66% | +0.64% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 13.30% | 17.64% | -4.34% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 13.30% | 18.86% | -5.56% |
MMID vs. VO - Expense Ratio Comparison
MMID has a 0.59% expense ratio, which is higher than VO's 0.03% expense ratio.
Dividends
MMID vs. VO - Dividend Comparison
MMID's dividend yield for the trailing twelve months is around 0.69%, less than VO's 1.33% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MMID MFS Active Mid Cap ETF | 0.69% | 0.28% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
VO Vanguard Mid-Cap ETF | 1.33% | 1.52% | 1.49% | 1.52% | 1.60% | 1.12% | 1.45% | 1.48% | 1.82% | 1.35% | 1.45% | 1.47% |
Frequently Asked Questions
MMID and VO have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, VO is cheaper at 0.03% per year. The better choice depends on whether you care most about return, fees, risk, or income.
VO is cheaper with a 0.03% expense ratio, compared with 0.59% for MMID.
VO has the higher dividend yield at 1.33%, compared with 0.69% for MMID.
They also come from different issuers: MFS and Vanguard. Their fees differ too: 0.59% for MMID and 0.03% for VO.
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