MBB vs SECR
iShares MBS ETF against NYLIM MacKay Securitized Income ETF: cost, size, returns, what they hold and how much of it is the same.
Overlap by weight
2%
24 shared positions
Fee gap
24 bp
MBB is cheaper
1-year return gap
2.1 pts
MBB is ahead
Larger fund
MBB
$35.2B
Side by side
| MBB | SECR | |
|---|---|---|
| Fund | iShares MBS ETF | NYLIM MacKay Securitized Income ETF |
| Issuer | iShares | New York Life |
| Category | Mortgage & Securitized | Mortgage & Securitized |
| Expense ratio | 0.04% | 0.28% |
| Assets | $35.2B | $164M |
| Average daily dollar volume | $690M | $143K |
| Listed | Mar 13, 2007 | May 30, 2024 |
| FrenzyCap score | 98 | 47 |
| 1-month return | −1.0% | −1.6% |
| 3-month return | −2.5% | −3.1% |
| Year to date | −4.9% | −5.6% |
| 1-year return | −5.7% | −7.8% |
| 30-day volatility | 6.7% | 5.9% |
| Worst drawdown, 1 year | −8.1% | −9.4% |
| Trailing 12-month yield | 4.50% | 6.57% |
| Holdings | 10,818 | 457 |
| Top 10 weight | 6.0% | 16.4% |
| Look-through P/E | — | — |
| Holdings vs fair value | — | — |
| Holdings above 200-day average | — | — |
| Net flow, latest 3 reported months | −$179M thru May 2026 | +$7.0M thru Jul 2026 |
| 30-day implied volatility | 7.8% | — |
| Holdings as of | as of Oct 20, 2026issuer data | as of Jul 31, 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.
Largest shared holdings
2% of MBB · 15% of SECR| Holding | MBB | SECR |
|---|---|---|
| FNMA 30YR UMBS, due Dec 1, 2051 | 0.53% | 1.88% |
| FHLMC 30YR UMBS SUPER, due May 1, 2051 | 1.05% | 0.33% |
| FNMA 30YR UMBS, due May 1, 2053 | 0.16% | 0.47% |
| FHLMC 30YR UMBS SUPER, due Jun 1, 2052 | 0.16% | 1.63% |
| FNMA 30YR UMBS, due Feb 1, 2052 | 0.11% | 0.30% |
| FNMA 30YR UMBS, due Oct 1, 2054 | 0.06% | 0.40% |
| FHLMC 30YR UMBS, due Jan 1, 2052 | 0.05% | 0.09% |
| GNMA2 30YR, due Nov 20, 2051 | 0.05% | 0.41% |
| FNMA 30YR UMBS, due Mar 1, 2056 | 0.05% | 0.73% |
| FNMA 30YR UMBS, due Jun 1, 2052 | 0.04% | 1.18% |
| FNMA 30YR UMBS, due May 1, 2053 | 0.03% | 0.49% |
| FNMA 30YR UMBS, due Mar 1, 2052 | 0.03% | 1.93% |
| FHLMC 30YR UMBS SUPER, due Jun 1, 2052 | 0.03% | 0.22% |
| FNMA 30YR UMBS, due Dec 1, 2054 | 0.02% | 1.08% |
| FHLMC 30YR UMBS, due Mar 1, 2052 | 0.02% | 0.04% |
| FNMA 30YR UMBS, due Nov 1, 2052 | 0.01% | 0.22% |
| FHLMC 30YR UMBS SUPER, due Sep 1, 2052 | 0.01% | 0.71% |
| FNMA 30YR UMBS, due Oct 1, 2051 | 0.01% | 1.27% |
| FNMA 30YR UMBS, due May 1, 2052 | 0.01% | 0.66% |
| FHLMC 30YR UMBS SUPER, due Jun 1, 2053 | 0.00% | 0.28% |
| FGOLD 30YR GIANT, due Aug 1, 2048 | 0.00% | 0.01% |
| FHLMC 30YR UMBS SUPER, due Sep 1, 2051 | 0.00% | 0.85% |
| FNMA 30YR, due Jan 1, 2049 | 0.00% | 0.01% |
| FNMA 30YR, due Jul 1, 2048 | 0.00% | 0.03% |
Sector mix of the stock holdings
No sector breakdown: these funds hold few classified stocks.
More: full overlap table · MBB holdings · SECR 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.