MMID vs. SPMD
MMID (MFS Active Mid Cap ETF) and SPMD (SPDR Portfolio S&P 400 Mid Cap ETF) are both Mid Cap Blend Equities funds. MMID is actively managed, while SPMD is passively managed. A 0.79 correlation means they provide meaningful diversification when combined. MMID charges 0.59%/yr vs 0.03%/yr for SPMD.
Performance
MMID vs. SPMD - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, MMID achieves a 6.73% return, which is significantly lower than SPMD's 15.74% return.
MMID
- 1D
- 1.25%
- 1M
- 2.13%
- 6M
- 2.59%
- YTD
- 6.73%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
SPMD
- 1D
- 0.48%
- 1M
- 0.09%
- 6M
- 8.74%
- YTD
- 15.74%
- 1Y
- 22.60%
- 3Y*
- 13.85%
- 5Y*
- 9.39%
- 10Y*
- 11.29%
MMID vs. SPMD - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
MMID MFS Active Mid Cap ETF | 6.73% | 0.62% |
SPMD SPDR Portfolio S&P 400 Mid Cap ETF | 15.74% | 1.21% |
Correlation
The correlation between MMID and SPMD is 0.79, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Sep 24, 2025 | 0.79 |
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
MMID vs. SPMD — Risk / Return Rank
MMID
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
SPMD
MMID vs. SPMD - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for MFS Active Mid Cap ETF (MMID) and SPDR Portfolio S&P 400 Mid Cap ETF (SPMD). 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 | SPMD | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | — | 1.26 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 2.56 | — |
| Martin ratioReturn relative to average drawdown | — | 9.31 | — |
Loading charts...
Drawdowns
MMID vs. SPMD - Drawdown Comparison
The maximum MMID drawdown since its inception was -7.93%, smaller than the maximum SPMD drawdown of -57.62%. Use the drawdown chart below to compare losses from any high point for MMID and SPMD.
Loading charts...
Drawdown Indicators
| MMID | SPMD | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -7.93% | -57.62% | +49.69% |
Max Drawdown (1Y)Largest decline over 1 year | — | -8.86% | — |
Max Drawdown (3Y)Largest decline over 3 years | — | -24.08% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -24.08% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -41.86% | — |
Current DrawdownCurrent decline from peak | 0.00% | -1.42% | +1.42% |
Average DrawdownAverage peak-to-trough decline | -1.96% | -8.08% | +6.12% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 2.43% | — |
Volatility
MMID vs. SPMD - Volatility Comparison
Loading charts...
Volatility by Period
| MMID | SPMD | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | — | 3.60% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 11.73% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 13.30% | 15.77% | -2.47% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 13.30% | 19.68% | -6.38% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 13.30% | 21.13% | -7.83% |
MMID vs. SPMD - Expense Ratio Comparison
MMID has a 0.59% expense ratio, which is higher than SPMD's 0.03% expense ratio.
Dividends
MMID vs. SPMD - Dividend Comparison
MMID's dividend yield for the trailing twelve months is around 0.69%, less than SPMD's 1.22% 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% |
SPMD SPDR Portfolio S&P 400 Mid Cap ETF | 1.22% | 1.39% | 1.42% | 1.47% | 1.64% | 1.24% | 1.30% | 1.57% | 1.85% | 1.97% | 2.13% | 5.33% |
Frequently Asked Questions
MMID and SPMD have a correlation of 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, SPMD is cheaper at 0.03% per year. The better choice depends on whether you care most about return, fees, risk, or income.
SPMD is cheaper with a 0.03% expense ratio, compared with 0.59% for MMID.
SPMD has the higher dividend yield at 1.22%, compared with 0.69% for MMID.
They also come from different issuers: MFS and State Street. Their fees differ too: 0.59% for MMID and 0.03% for SPMD.
Find the right allocation for MMID and SPMD
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer