MFSX vs SUB
MFS Active Short Muni Bond ETF against iShares Short-Term National Muni Bond ETF: cost, size, returns, what they hold and how much of it is the same.
Fee gap
—
same fee
1-year return gap
—
Larger fund
SUB
$12.3B
Side by side
| MFSX | SUB | |
|---|---|---|
| Fund | MFS Active Short Muni Bond ETF | iShares Short-Term National Muni Bond ETF |
| Issuer | MFS | iShares |
| Category | Short Muni | Short Muni |
| Expense ratio | — | 0.07% |
| Assets | — | $12.3B |
| Average daily dollar volume | $1.1M | $127M |
| Listed | Sep 9, 2026 | Nov 5, 2008 |
| FrenzyCap score | — | 98 |
| 1-month return | −0.9% | −0.6% |
| 3-month return | — | −1.4% |
| Year to date | — | −1.8% |
| 1-year return | — | −1.7% |
| 30-day volatility | 3.7% | 2.3% |
| Worst drawdown, 1 year | −1.7% | −3.1% |
| Trailing 12-month yield | — | 2.60% |
| Holdings | — | 3,039 |
| Top 10 weight | — | 2.5% |
| Look-through P/E | — | — |
| Holdings vs fair value | — | — |
| Holdings above 200-day average | — | — |
| Net flow, latest 3 reported months | — | +$479M thru May 2026 |
| 30-day implied volatility | — | — |
| Holdings as of | as of Oct 8, 2026issuer data |
Returns are price returns and exclude distributions. Flows are each fund's own latest reported months and may not cover the same period.
More: full overlap table · MFSX holdings · SUB holdings
Fund data comes from each fund's SEC filings and issuer disclosures and is shown with the date it is as of. SEC portfolio and flow filings become public about 60 days after the period they cover. Nothing here is investment advice; see Terms.