iShares MBS ETF
Portfolio Exposure & Concentration
Look-through constituent allocation & index mechanics (S47B)
Securities in fund basket
Combined weight of largest 10
Fund constituent
Active industry exposures
Top 25 Holdings — MBB (S47B-01)
Statutory Form N-PORT authenticated portfolio weights with direct equity research bridge (S47B-04)
| # | Company / Security | Portfolio Weight | Equity Research | |
|---|---|---|---|---|
| No constituents found matching “” | ||||
GICS 11-Sector Allocation (S47B-02)
Industry diversification across standard economic classifications
Portfolio Breakdown & Allocation Matrix
Multi-dimensional constituent classification sourced from SEC Form N-PORT and Issuer Fact Sheets (S48-Phase 2)
Sub-sector clusters reflect concentrated industry exposures beyond broad GICS sectors.
Market Cap Tier Breakdown (S47B-05)
Weighted capital size distribution of fund holdings
Look-Through Concentration Engine (S47B-03)
Calculates aggregate effective single-stock exposure across direct holdings & pooled ETFs
// Mathematical SSOT Formulation:
W_i = w_{direct, i} + ∑_f (a_f × w_{f,i})
Real-World Institutional Use-Case:
An investor holding 5% direct AAPL equity, plus 40% in VOO and 20% in QQQ, actually bears:
Vantage Portfolios look-through alerts eliminate hidden tech over-concentration and unintended double-exposure across multi-asset portfolios.