Compare fund portfolios
See how two funds' portfolios overlap. Enter two tickers:
MRBKX vs MFSB
Shared holdings
108
MRBKX covered by MFSB
17.30%
MFSB covered by MRBKX
17.30%
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.
MRBKX (April 30, 2026)
| Security | Weight | |
|---|---|---|
| US TREASURY N/B | 3.26% | |
| US TREASURY N/B | 2.10% | |
| US TREASURY N/B | 2.03% | |
| US TREASURY N/B | 1.95% | |
| MFS Institutional Money Market Portfolio, Class A | 1.52% | |
| US TREASURY N/B | 1.23% | |
| US TREASURY N/B | 1.15% | |
| US TREASURY N/B | 1.12% | |
| US TREASURY N/B | 1.11% | |
| FR SD8199 | 1.07% | |
| US TREASURY N/B | 1.03% | |
| US TREASURY N/B | 0.86% | |
| US TREASURY N/B | 0.82% | |
| US TREASURY N/B | 0.78% | |
| US TREASURY N/B | 0.68% | |
| US TREASURY N/B | 0.68% | |
| US TREASURY N/B | 0.60% | |
| US TREASURY N/B | 0.57% | |
| MQGAU V4.442 06/21/33 144A | 0.55% | |
| CHENIERE ENERGYP | 0.54% | |
| US TREASURY N/B | 0.54% | |
| US TREASURY N/B | 0.54% | |
| US TREASURY N/B | 0.54% | |
| US TREASURY N/B | 0.53% | |
| LoanCore Issuer Ltd., Series 2021-CRE6, Class B | 0.52% | |
| WELLS FARGO CO | 0.51% | |
| BANK OF AMER CRP | 0.49% | |
| Arbor Realty Commercial Real Estate Notes Ltd., Series 2022-FL1, Class D | 0.49% | |
| LoanCore Issuer LLC, Series 2025-CRE8, Class AS | 0.48% | |
| US TREASURY N/B | 0.47% | |
| BXMT Ltd., Series 2021-FL4, Class B | 0.46% | |
| DISCOVER FINANCIAL SERVICES | 0.45% | |
| BANK OF AMER CRP | 0.44% | |
| Uniform Mortgage-Backed Security, TBA | 0.42% | |
| Iron Mountain Inc. | 0.42% | |
| NRZT 2025-NQM4 A1 | 0.42% | |
| SUMITOMO MITSUI | 0.41% | |
| Black Diamond CLO Ltd., Series 2021-1A, Class A2R | 0.41% | |
| PENSKE AUTOMOTIVE GROUP REGD 3.75000000 | 0.40% | |
| TRANSDIGM INC SUB 4.625% 01-15-29 | 0.39% | |
| UBSCM 2017-C7 A4 | 0.39% | |
| PLAINS ALL AMER | 0.39% | |
| ENEL FINANCE INTL NV REGD 144A P/P 3.50000000 | 0.36% | |
| US TREASURY N/B | 0.36% | |
| QUIKRETE HOLDINGS INC SR SECURED 144A 03/32 6.375 | 0.35% | |
| Venture 43 CLO Ltd | 0.34% | |
| ARDN Mortgage Trust, Series 2025-ARCP, Class B | 0.34% | |
| SAMMONS FINL. GRP. 6.875% | 0.34% | |
| MITSUB UFJ FIN | 0.34% | |
| JPMORGAN CHASE | 0.34% |
MFSB (Feb. 28, 2026)
| Security | Weight | |
|---|---|---|
| US TREASURY N/B | 5.11% | |
| US TREASURY N/B | 4.44% | |
| State Street Navigator Securities Lending Portfolio II | 3.18% | |
| US TREASURY N/B | 2.34% | |
| US TREASURY N/B | 2.25% | |
| US TREASURY N/B | 2.25% | |
| US TREASURY N/B | 1.54% | |
| US TREASURY N/B | 1.38% | |
| US TREASURY N/B | 1.24% | |
| FN MA5552 | 0.94% | |
| US TREASURY N/B | 0.80% | |
| Uniform Mortgage-Backed Security, TBA | 0.73% | |
| US TREASURY N/B | 0.65% | |
| STOAU 5.75 11/13/35 144A | 0.65% | |
| BOSTON PROP LP | 0.64% | |
| NRZT, Series 2025-NQM6, Class A1 | 0.62% | |
| MF1 LLC, Series 2025-FL20, Class C | 0.60% | |
| BOEING CO/THE | 0.58% | |
| PMT Loan Trust, Series 2026-INV2, Class A35 | 0.57% | |
| HIGHWOODS REALTY | 0.57% | |
| ENERGY TRANS | 0.57% | |
| New Residential Mortgage Loan Trust, Series 2026-NQM3, Class A1 | 0.56% | |
| FR SD8199 | 0.55% | |
| Bain Capital Credit CLO 2021-4 Ltd | 0.55% | |
| VORNADO REALTY LP SR UNSECURED 02/33 5.75 | 0.55% | |
| FR SD8213 | 0.55% | |
| NTT FINANCE | 0.54% | |
| CBRE SERVICES IN | 0.54% | |
| Dryden 98 CLO Ltd | 0.53% | |
| C V6.875 PERP GG | 0.53% | |
| Unity-Peace Park CLO Ltd | 0.53% | |
| AVOLON HOLDINGS FUNDING LTD 4.95% 10/15/2032 144A | 0.51% | |
| Enel SPA 7.50 10/14/2032 | 0.50% | |
| JEFFERIES GROUP | 0.50% | |
| ROGERS COMMUNIC | 0.49% | |
| JAPAN TOBACCO INC SR UNSECURED 144A 06/35 5.85 | 0.48% | |
| FN MA4562 | 0.47% | |
| DICK'S SPORTING | 0.47% | |
| ELM Trust, Series 2024-ELM, Class C15 | 0.47% | |
| FR 5.25 01/15/31 | 0.47% | |
| FERGUSON ENTERPR | 0.47% | |
| CHARLES SCHWAB | 0.46% | |
| TARGA RESOURCES | 0.46% | |
| JPMORGAN CHASE | 0.45% | |
| ASHTEAD CAPITAL | 0.45% | |
| BROWN & BROWN | 0.44% | |
| AUTONATION INC | 0.43% | |
| WELLS FARGO CO | 0.43% | |
| PFP Ltd., Series 2026-13, Class AS | 0.43% | |
| Dryden 86 CLO Ltd., Series 2020-86A, Class CR2 | 0.42% |
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