VMBS vs BKAG: Holdings Overlap
VMBSVanguard Mortgage-backed Securities Index Fund
Vanguard · 5112 holdings · $15.6B · as of 2026-05-31
BNY Mellon · 5070 holdings · $2.2B · as of 2026-04-30
Holdings snapshots are 31 days apart (VMBS: 2026-05-31, BKAG: 2026-04-30). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are VMBS and BKAG?
Vanguard Mortgage-backed Securities Index Fund (VMBS, by Vanguard) holds 5112 positions; BNY Mellon Core Bond ETF (BKAG, by BNY Mellon) holds 5070. They have 492 holdings in common, and by portfolio weight the two funds are 7.2% identical. In practical terms the pair is lightly overlapping, with most of each portfolio distinct.
- Overlap by Weight
- 7.2%Sum of the smaller weight of each shared holding
- Shared Holdings
- 492VMBS holds 5112 · BKAG holds 5070
- Weight in Shared Holdings
- VMBS 24%·BKAG 9%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in VMBS
4620 of 5112 positions (75.2% of the fund) are not held by BKAG. Showing the top 30 by weight.
- Uniform Mortgage-Backed Security, TBA0.52%
- G2SF 5.5 7/260.36%
- FN CC27620.29%
- Government National Mortgage Association0.29%
- Government National Mortgage Association0.28%
- FR SD41550.27%
Only in BKAG
4578 of 5070 positions (90.3% of the fund) are not held by VMBS. Showing the top 30 by weight.
- U.S. Treasury Notes/Bonds0.60%
- U.S. Treasury Notes0.56%
- U.S. Treasury Notes0.47%
- U.S. Treasury Notes0.46%
- U.S. Treasury Notes0.44%
- U.S. Treasury Notes0.43%
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| VMBS | -0.1% | +0.6% | +4.1% | +4.9% | +0.4% | +1.3% | 4.23% |
| BKAG | -0.6% | -0.3% | +2.1% | +4.1% | -0.3% | — | 3.94% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in VMBS vs BKAG →
Shared Holdings(492)
The top 10 shared positions account for 15% of the overlap, led by Ginnie Mae II Pool, Uniform Mortgage-Backed Securities and Ginnie Mae II Pool.
| Ginnie Mae II Pool | 0.14% | 0.14% | 0.14% |
|---|---|---|---|
| Uniform Mortgage-Backed Securities | 0.15% | 0.13% | 0.13% |
| Ginnie Mae II Pool | 0.12% | 0.13% | 0.12% |
| FNMA/FHLMC UMBS, Single Family, 30 Year | 0.14% | 0.11% | 0.11% |
| Freddie Mac Pool | 0.20% | 0.11% | 0.11% |
| Ginnie Mae II Pool | 0.19% | 0.11% | 0.11% |
| Government National Mortgage Association | 0.20% | 0.10% | 0.10% |
| Freddie Mac Pool | 0.13% | 0.10% | 0.10% |
| Fannie Mae Pool | 0.09% | 0.10% | 0.09% |
| Government National Mortgage Association | 0.20% | 0.09% | 0.09% |
| Ginnie Mae II Pool | 0.31% | 0.08% | 0.08% |
| Uniform Mortgage-Backed Securities | 0.08% | 0.20% | 0.08% |
| Government National Mortgage Association | 0.20% | 0.08% | 0.08% |
| Government National Mortgage Association | 0.32% | 0.08% | 0.08% |
| Ginnie Mae II Pool | 0.11% | 0.08% | 0.08% |
| Ginnie Mae II Pool | 0.14% | 0.08% | 0.08% |
| G2-30YR-Multi | 0.15% | 0.08% | 0.08% |
| Fannie Mae Pool | 0.08% | 0.07% | 0.07% |
| Fannie Mae Pool | 0.07% | 0.28% | 0.07% |
| Government National Mortgage Association | 0.08% | 0.07% | 0.07% |
| Ginnie Mae II Pool | 0.07% | 0.10% | 0.07% |
| Ginnie Mae II Pool | 0.07% | 0.07% | 0.07% |
| Uniform Mortgage-Backed Securities | 0.09% | 0.07% | 0.07% |
| Government National Mortgage Association | 0.06% | 0.08% | 0.06% |
| Fannie Mae Pool | 0.12% | 0.06% | 0.06% |
Showing the top 250 of 492 shared holdings by overlap weight.
Frequently Asked Questions
How much do VMBS and BKAG overlap?
VMBS and BKAG overlap by 7.2% of portfolio weight. They share 492 holdings (VMBS holds 5112 positions and BKAG holds 5070), based on each fund's latest SEC-reported holdings.
Is it redundant to own both VMBS and BKAG?
The two portfolios are 7.2% identical by weight. Owning both is not redundant. Most of each portfolio is distinct, so the funds can serve different roles.
What are the biggest shared holdings of VMBS and BKAG?
The largest positions held by both funds are Ginnie Mae II Pool, Uniform Mortgage-Backed Securities, Ginnie Mae II Pool, FNMA/FHLMC UMBS, Single Family, 30 Year and Freddie Mac Pool. Together the top 10 shared positions account for 15% of the total overlap.
What does VMBS own that BKAG doesn't?
4620 positions (75.2% of VMBS) are unique to VMBS, led by Uniform Mortgage-Backed Security, TBA, G2SF 5.5 7/26 and FN CC2762. In the other direction, 4578 positions (90.3% of BKAG) are unique to BKAG.