iShares Core U.S. Aggregate Bond ETF (AGG) and Vanguard Total Bond Market ETF (BND) have little to no holdings in common — their portfolios barely overlap.
Weight overlap
0%
Shared portfolio weight
Shared holdings
—
Securities in both funds
Funds
AGG · BND
Compared side by side
Interactive charts, sector exposure, combined allocation, and the full overlap heatmap.
AGG
BND
Two ETFs overlap when they hold the same underlying securities. Holding both funds can leave you more concentrated than you think — you may own the same large companies twice, at a combined weight neither fund shows on its own. The weight overlap above is the share of portfolio weight the two funds hold in common: for every security both own, it counts only the smaller of the two weights (the slice you genuinely double up on). 0% means completely different books; 100% means effectively identical funds.