Compare fund portfolios
See how two funds' portfolios overlap. Enter two tickers:
MBB vs IUSB
Shared holdings
1191
MBB covered by IUSB
11.45%
IUSB covered by MBB
11.45%
Coverage = share of one portfolio's weight reproduced by the other (overlapping positions, min weight). Top 50 positions per side shown; = held by both — hover a shared position to highlight it in both columns.
MBB (Feb. 28, 2026)
| Security | Weight | |
|---|---|---|
| BlackRock Cash Funds: Treasury, SL Agency Shares | 5.66% | |
| FR SD8146 | 1.03% | |
| GNII II 5.5% 03/01/2056 #TBA | 0.96% | |
| FNCL 5 3/24 | 0.55% | |
| G2 MA7648 | 0.53% | |
| G2 MA7766 | 0.52% | |
| FN MA4492 | 0.51% | |
| G2SF 5 3/25 | 0.51% | |
| FR SD8140 | 0.49% | |
| FNCL 5.5 3/25 | 0.48% | |
| G2 MA7472 | 0.45% | |
| Government National Mortgage Association, TBA | 0.44% | |
| FN MA4465 | 0.43% | |
| Uniform Mortgage-Backed Securities | 0.43% | |
| G2 MB0025 | 0.41% | |
| G2 MA7935 | 0.36% | |
| G2 MA7367 | 0.35% | |
| Uniform Mortgage-Backed Security, TBA | 0.34% | |
| FR SD8199 | 0.34% | |
| FN MA4281 | 0.32% | |
| Fannie Mae Pool | 0.32% | |
| G2 MA9171 | 0.31% | |
| FN MA4437 | 0.31% | |
| G2 MA7826 | 0.30% | |
| G2 MA7534 | 0.30% | |
| FN MA4305 | 0.29% | |
| Fannie Mae Pool | 0.28% | |
| G2 MA7936 | 0.28% | |
| G2 MA7051 | 0.27% | |
| G2 MA7767 | 0.27% | |
| G2 MA9965 | 0.26% | |
| FR SD8324 | 0.25% | |
| FNCL 6 3/24 | 0.24% | |
| G2 MB0624 | 0.24% | |
| FR SD8182 | 0.23% | |
| FANNIE MAE POOL FN 05/52 FIXED VAR | 0.22% | |
| G2 MA9781 | 0.22% | |
| G2 MA7987 | 0.22% | |
| G2 MA7589 | 0.22% | |
| FR SD8134 | 0.22% | |
| FR SD8362 | 0.22% | |
| Uniform Mortgage-Backed Securities | 0.21% | |
| Uniform Mortgage-Backed Securities | 0.21% | |
| FR RA5205 | 0.21% | |
| FNCL UMBS 3.0 CA9308 02-01-51 | 0.21% | |
| G2 MA9852 | 0.20% | |
| Uniform Mortgage-Backed Securities | 0.20% | |
| G2 MB0091 | 0.19% | |
| Freddie Mac Pool | 0.19% | |
| FR SD8234 | 0.19% |
IUSB (Jan. 31, 2026)
| Security | Weight | |
|---|---|---|
| Blackrock Liquidity TempCash Inst | 2.30% | |
| BlackRock Cash Funds: Treasury, SL Agency Shares | 0.78% | |
| US TREASURY N/B | 0.38% | |
| US TREASURY N/B | 0.38% | |
| US TREASURY N/B | 0.38% | |
| US TREASURY N/B | 0.38% | |
| US TREASURY N/B | 0.37% | |
| US TREASURY N/B | 0.37% | |
| US TREASURY N/B | 0.35% | |
| US TREASURY N/B | 0.35% | |
| US TREASURY N/B | 0.34% | |
| US TREASURY N/B | 0.34% | |
| FN MA4018 | 0.33% | |
| US TREASURY N/B | 0.33% | |
| US TREASURY N/B | 0.32% | |
| US TREASURY N/B | 0.32% | |
| US TREASURY N/B | 0.31% | |
| US TREASURY N/B | 0.30% | |
| US TREASURY N/B | 0.29% | |
| US TREASURY N/B | 0.28% | |
| US TREASURY N/B | 0.28% | |
| US TREASURY N/B | 0.27% | |
| US TREASURY N/B | 0.27% | |
| US TREASURY N/B | 0.27% | |
| US TREASURY N/B | 0.26% | |
| US TREASURY N/B | 0.26% | |
| US TREASURY N/B | 0.26% | |
| US TREASURY N/B | 0.26% | |
| US TREASURY N/B | 0.26% | |
| US TREASURY N/B | 0.25% | |
| US TREASURY N/B | 0.25% | |
| US TREASURY N/B | 0.25% | |
| US TREASURY N/B | 0.25% | |
| US TREASURY N/B | 0.24% | |
| US TREASURY N/B | 0.24% | |
| US TREASURY N/B | 0.24% | |
| US TREASURY N/B | 0.24% | |
| US TREASURY N/B | 0.24% | |
| US TREASURY N/B | 0.24% | |
| US TREASURY N/B | 0.23% | |
| US TREASURY N/B | 0.23% | |
| US TREASURY N/B | 0.23% | |
| US TREASURY N/B | 0.23% | |
| US TREASURY N/B | 0.22% | |
| US TREASURY N/B | 0.22% | |
| US TREASURY N/B | 0.22% | |
| US TREASURY N/B | 0.22% | |
| G2 MA7192 | 0.22% | |
| US TREASURY N/B | 0.21% | |
| US TREASURY N/B | 0.21% |
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