CBOX vs MUB
Calamos Tax-Aware Collateral ETF against iShares National Muni Bond ETF: cost, size, returns, what they hold and how much of it is the same.
Fee gap
9 bp
MUB is cheaper
1-year return gap
—
Larger fund
MUB
$52.1B
Side by side
| CBOX | MUB | |
|---|---|---|
| Fund | Calamos Tax-Aware Collateral ETF | iShares National Muni Bond ETF |
| Issuer | Calamos | iShares |
| Category | National Muni | National Muni |
| Expense ratio | 0.14% | 0.05% |
| Assets | $1.3B | $52.1B |
| Average daily dollar volume | $7.8M | $1.8B |
| Listed | Apr 15, 2026 | Sep 7, 2007 |
| FrenzyCap score | 57 | 99 |
| 1-month return | +0.4% | −0.3% |
| 3-month return | +1.0% | −2.7% |
| Year to date | — | −4.3% |
| 1-year return | — | −4.7% |
| 30-day volatility | 0.9% | 6.3% |
| Worst drawdown, 1 year | −2.9% | −7.9% |
| Trailing 12-month yield | — | 3.33% |
| Holdings | 2 | 7,665 |
| Top 10 weight | 99.8% | 1.2% |
| Look-through P/E | — | — |
| Holdings vs fair value | — | — |
| Holdings above 200-day average | — | — |
| Net flow, latest 3 reported months | +$445M thru Jul 2026 | +$2.4B thru May 2026 |
| 30-day implied volatility | — | 7.5% |
| Holdings as of | as of Jul 31, 2026SEC filing | as of Oct 20, 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 · CBOX holdings · MUB 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.