MMK vs. MUST
MMK (State Street Prime Money Market ETF) and MUST (Columbia Multi-Sector Municipal Income ETF) are both Money Market funds. MMK is actively managed, while MUST is passively managed. At a correlation of -0.20, they often move in opposite directions. MMK charges 0.18%/yr vs 0.23%/yr for MUST.
Performance
MMK vs. MUST - Performance Comparison
Loading charts...
Returns By Period
MMK
- 1D
- 0.00%
- 1M
- 0.31%
- 6M
- —
- YTD
- —
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
- ALL TIME*
- —
MUST
- 1D
- -0.88%
- 1M
- -2.15%
- 6M
- -0.92%
- YTD
- -0.34%
- 1Y
- 4.86%
- 3Y*
- 2.55%
- 5Y*
- 0.24%
- 10Y*
- —
- ALL TIME*
- 2.70%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $153.90K | $186.00K | $185.90K | |
| $2.86M | $2.37M | $2.30M |
MMK vs. MUST - Yearly Performance Comparison
| 2026 (YTD) | |
|---|---|
MMK State Street Prime Money Market ETF | 1.59% |
MUST Columbia Multi-Sector Municipal Income ETF | -2.14% |
Correlation
The correlation between MMK and MUST is -0.20, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Feb 12, 2026 | -0.20 |
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
MMK vs. MUST — Risk / Return Rank
MMK
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
MUST
MMK vs. MUST - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for State Street Prime Money Market ETF (MMK) and Columbia Multi-Sector Municipal Income ETF (MUST). 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.
| MMK | MUST | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | — | 1.18 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 1.62 | — |
| Martin ratioReturn relative to average drawdown | — | 4.25 | — |
Loading charts...
Drawdowns
MMK vs. MUST - Drawdown Comparison
The maximum MMK drawdown since its inception was -0.01%, smaller than the maximum MUST drawdown of -13.83%. Use the drawdown chart below to compare losses from any high point for MMK and MUST.
Loading charts...
Drawdown Indicators
| MMK | MUST | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -0.01% | -13.83% | +13.82% |
Max Drawdown (1Y)Largest decline over 1 year | — | -3.01% | — |
Max Drawdown (3Y)Largest decline over 3 years | — | -6.03% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -13.83% | — |
Current DrawdownCurrent decline from peak | 0.00% | -2.84% | +2.84% |
Average DrawdownAverage peak-to-trough decline | -0.00% | -3.37% | +3.37% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 1.15% | — |
Volatility
MMK vs. MUST - Volatility Comparison
Loading charts...
Volatility by Period
| MMK | MUST | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | — | 1.59% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 3.70% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 0.17% | 5.07% | -4.90% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 0.17% | 5.49% | -5.32% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 0.17% | 5.58% | -5.41% |
MMK vs. MUST - Expense Ratio Comparison
MMK has a 0.18% expense ratio, which is lower than MUST's 0.23% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
MMK vs. MUST - Dividend Comparison
MMK's dividend yield for the trailing twelve months is around 1.37%, less than MUST's 3.41% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 |
|---|---|---|---|---|---|---|---|---|---|
MMK State Street Prime Money Market ETF | 1.37% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
MUST Columbia Multi-Sector Municipal Income ETF | 3.41% | 3.28% | 3.13% | 2.51% | 1.76% | 1.62% | 2.33% | 2.70% | 0.55% |
Frequently Asked Questions
MMK and MUST have a correlation of -0.20, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
On fees, MMK is cheaper at 0.18% per year. The better choice depends on whether you care most about return, fees, risk, or income.
MMK is cheaper with a 0.18% expense ratio, compared with 0.23% for MUST.
MUST has the higher dividend yield at 3.41%, compared with 1.37% for MMK.
They also come from different issuers: State Street and Ameriprise Financial. Their fees differ too: 0.18% for MMK and 0.23% for MUST.
Find the right allocation for MMK and MUST
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