FSEC vs MBB
Fidelity Investment Grade Securitized ETF against iShares MBS ETF: cost, size, returns, what they hold and how much of it is the same.
Overlap by weight
5%
89 shared positions
Fee gap
32 bp
MBB is cheaper
1-year return gap
0.1 pts
MBB is ahead
Larger fund
MBB
$35.2B
Side by side
| FSEC | MBB | |
|---|---|---|
| Fund | Fidelity Investment Grade Securitized ETF | iShares MBS ETF |
| Issuer | Fidelity | iShares |
| Category | Mortgage & Securitized | Mortgage & Securitized |
| Expense ratio | 0.36% | 0.04% |
| Assets | $4.5B | $35.2B |
| Average daily dollar volume | $25M | $690M |
| Listed | Mar 2, 2021 | Mar 13, 2007 |
| FrenzyCap score | 74 | 98 |
| 1-month return | −1.3% | −1.0% |
| 3-month return | −2.6% | −2.5% |
| Year to date | −4.4% | −4.9% |
| 1-year return | −5.8% | −5.7% |
| 30-day volatility | 6.1% | 6.7% |
| Worst drawdown, 1 year | −7.4% | −8.1% |
| Trailing 12-month yield | 4.62% | 4.50% |
| Holdings | 1,200 | 10,818 |
| Top 10 weight | 23.1% | 6.0% |
| Look-through P/E | — | — |
| Holdings vs fair value | — | — |
| Holdings above 200-day average | — | — |
| Net flow, latest 3 reported months | +$87M thru May 2026 | −$179M thru May 2026 |
| 30-day implied volatility | — | 7.8% |
| Holdings as of | as of Oct 20, 2026issuer data | 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.
Largest shared holdings
26% of FSEC · 9% of MBB| Holding | FSEC | MBB |
|---|---|---|
| GNII II 6% 11/56 #TBA, due Nov 1, 2056 | 3.11% | 0.62% |
| GNII II 5.5% 11/56 #TBA, due Nov 1, 2056 | 4.99% | 0.53% |
| UMBS 30YR 5% 11/56 #TBA, due Nov 1, 2056 | 3.32% | 0.35% |
| GNII II 2% 01/52#MA7826, due Jan 20, 2052 | 0.70% | 0.33% |
| UMBS 30YR 2% 11/56 #TBA, due Nov 1, 2056 | 1.06% | 0.22% |
| UMBS 30YR 2.5% 11/56 #TBA, due Nov 1, 2056 | 0.27% | 0.16% |
| GNII II 4.5% 11/54#MB0024, due Nov 20, 2054 | 0.62% | 0.15% |
| GNII II 3% 05/52#MA8043, due May 20, 2052 | 0.65% | 0.12% |
| UMBS 30YR 3% 11/56 #TBA, due Nov 1, 2056 | 0.51% | 0.12% |
| UMBS 30YR 4.5% 11/56 #TBA, due Nov 1, 2056 | 0.18% | 0.11% |
| FNMA 30YR 2% 03/51#MA4281, due Mar 1, 2051 | 0.11% | 0.29% |
| GNII II 2.5% 05/52#MA8042, due May 20, 2052 | 0.82% | 0.11% |
| FNMA 30YR 2% 04/51#MA4305, due Apr 1, 2051 | 0.10% | 0.30% |
| FNMA 30YR 2% 07/50#MA4077, due Jul 1, 2050 | 0.18% | 0.10% |
| FHLG 30YR 4.5% 09/52#SD8245, due Sep 1, 2052 | 0.34% | 0.10% |
| FHLG 30YR 6% 09/54#SD7574, due Sep 1, 2054 | 0.13% | 0.08% |
| FNMA 30YR 2.5% 12/51#FM9732, due Dec 1, 2051 | 0.07% | 0.07% |
| GNII II 2% 07/51#MA7471, due Jul 20, 2051 | 0.86% | 0.07% |
| FNMA 30YR 2% 05/51#MA4325, due May 1, 2051 | 0.07% | 0.12% |
| FNMA 30YR 2% 04/51#FM6834, due Apr 1, 2051 | 0.06% | 0.12% |
| GNII II 3% 11/46#MA4126, due Dec 20, 2046 | 0.15% | 0.06% |
| GNII II 2% 08/50#MA6818, due Aug 20, 2050 | 0.06% | 0.05% |
| FNMA 30YR 2% 01/51#MA4237, due Jan 1, 2051 | 0.18% | 0.05% |
| GNMA II 3.5% 10/52#MA8345, due Oct 20, 2052 | 0.05% | 0.06% |
| UMBS 30YR 3.5% 11/56 #TBA, due Nov 1, 2056 | 1.69% | 0.05% |
Sector mix of the stock holdings
No sector breakdown: these funds hold few classified stocks.
More: full overlap table · FSEC holdings · MBB 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.