MBB vs WDE
iShares MBS ETF against Principal Securitized Debt ETF: cost, size, returns, what they hold and how much of it is the same.
Fee gap
15 bp
MBB is cheaper
1-year return gap
—
Larger fund
MBB
$35.6B
Side by side
| MBB | WDE | |
|---|---|---|
| Fund | iShares MBS ETF | Principal Securitized Debt ETF |
| Issuer | iShares | Principal |
| Category | Mortgage & Securitized | Mortgage & Securitized |
| Expense ratio | 0.04% | 0.19% |
| Assets | $35.6B | $20M |
| Average daily dollar volume | $591M | $223K |
| Listed | Mar 13, 2007 | May 21, 2026 |
| FrenzyCap score | 98 | 37 |
| 1-month return | −1.8% | −2.2% |
| 3-month return | −3.7% | −3.3% |
| Year to date | −5.7% | — |
| 1-year return | −5.6% | — |
| 30-day volatility | 6.6% | 5.7% |
| Worst drawdown, 1 year | −8.1% | −4.8% |
| Trailing 12-month yield | 4.53% | 1.85% |
| Holdings | 10,858 | 41 |
| Top 10 weight | 6.0% | 50.8% |
| Look-through P/E | — | — |
| Holdings vs fair value | — | — |
| Holdings above 200-day average | — | — |
| Net flow, latest 3 reported months | −$179M thru May 2026 | +$20M thru Jun 2026 |
| 30-day implied volatility | 7.7% | — |
| Holdings as of | as of Oct 8, 2026issuer data | as of Jun 30, 2026SEC filing |
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 · MBB holdings · WDE 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.