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ETF Analytics

MBB ETF Holdings & Fundamentals

Fund Profile · Cost · Size · Liquidity · Exposure

Financial ServicesAsset Management - BondsScore data as of Oct 21, 2026

MBBiShares MBS ETF

Financial Services / Asset Management - Bonds

Relative Leader / Watch

Strong Relative Position

NeutralEdge 8/10
$90.54+$0.05 (+0.06%)

Latest quote

  • Momentum
    56
  • Value
    45
  • Quality
    68
  • Risk resilience
    87
  • Sentiment
    —
algovestiq.comScore data as of Oct 21, 2026

MBB Holdings

11,209 holdings; the ten largest make up 5.82% of the fund. Holdings as of Sep 11, 2026.

Holdings
11,209
Top 10 weight
5.82%
Share of the fund in its ten largest positions
Largest holding
FHLMC 30YR UMBS SUPER 2.00% 05/01/2051
0.87%
Expense ratio
0.04%
$4.00 a year per $10,000
Fund size
$35.23B
Top sector
Federal National Mortgage Association
42.64%
Top 25 holdings by weight
RankSymbolHoldingWeightMarket value
1BLACKROCK CASH CL INST SL AGENCY6.54%$2.87B
2USD CASH5.30%-$2.33B
3FHLMC 30YR UMBS SUPER 2.00% 05/01/20510.87%$381.48M
4UMBS 30YR TBA(REG A) 5.50% 10/13/20260.79%$348.17M
5UMBS 30YR TBA(REG A) 5.00% 10/13/20260.67%$292.58M
6GNMA2 30YR TBA(REG C) 5.50% 09/21/20260.63%$278.64M
7GNMA2 30YR TBA(REG C) 6.00% 09/21/20260.56%$246.98M
8GNMA2 30YR TBA(REG C) 5.00% 09/21/20260.49%$214.98M
9GNMA2 30YR 5.00% 11/20/20540.49%$214.98M
10GNMA2 30YR 2.00% 10/20/20510.45%$197.24M
11GNMA2 30YR 2.00% 12/20/20510.44%$193.85M
12FNMA 30YR UMBS 2.00% 12/01/20510.43%$191.06M
13GNMA2 30YR 2.50% 07/20/20510.43%$188.11M
14GNMA2 30YR TBA(REG C) 4.50% 09/21/20260.43%$187.27M
15FHLMC 30YR UMBS SUPER 2.00% 04/01/20510.42%$183.21M
16FNMA 30YR UMBS 2.00% 11/01/20510.37%$162.08M
17FNMA 30YR UMBS SUPER 2.00% 07/01/20510.36%$158.89M
18GNMA2 30YR 5.00% 04/20/20560.36%$157.13M
19UMBS 15YR TBA(REG B) 4.00% 09/17/20260.35%$153.95M
20GNMA2 30YR 5.50% 09/20/20530.34%$147.1M
21GNMA2 30YR 5.50% 09/20/20550.33%$144.88M
22GNMA2 30YR 2.00% 03/20/20520.30%$132.08M
23UMBS 15YR TBA(REG B) 2.00% 09/17/20260.30%$131.39M
24GNMA2 30YR 2.50% 05/20/20510.29%$128.66M
25UMBS 30YR TBA(REG A) 6.00% 10/13/20260.29%$126.79M

MBB Expense Ratio

MBB charges 0.04% a year, about $4.00 for every $10,000 invested.

Yearly cost by amount invested
InvestedCost a year
$10,000$4.00
$25,000$10.00
$100,000$40.00

The fee is taken from the fund's assets rather than billed, so it shows up as slightly lower returns.

ETF Analytics Snapshot

Current ETF evidence uses fund profile, cost, size, distribution, momentum, and risk fields.

Price
$90.54
As of Oct 21, 2026
Fund size
$35.23B
Expense ratio
0.04%
Distribution yield
4.51%
IShares ETF evidence

ETF pages use fund-native profile fields for cost, size, liquidity, holdings breadth, NAV, issuer, and launch date.

Review ETF analytics
Holdings
11,209
NAV
$90.35
Average volume
3.86M
Inception
Mar 13, 2007
Asset class
Fixed Income
Primary exposure
Federal National Mortgage Association (42.64%)
Beta
1.14
Momentum score
56/100

ETF Fundamentals Overview

Fund-native evidence replaces stock-only quarterly statement fields for ETF pages.

Fund profile

FieldValue
Fund nameiShares MBS ETF
IssuerIShares
Asset classFixed Income
Primary exposureFederal National Mortgage Association (42.64%)
DomicileUS
Inception dateMar 13, 2007
Websitehttps://www.ishares.com/us/products/239465/ishares-mbs-etf

Current ETF metrics

FieldValue
Fund size$35.23B
Expense ratio0.04%
Holdings count11,209
NAV$90.35
Average volume3.86M
Distribution yield4.51%
Beta1.14

ETF Exposure

Sector and country weights of the fund's holdings.

Sector exposure
FieldValue
Government National Mortgage Association24.01%
Federal Home Loan Mortgage Corporation30.24%
Federal National Mortgage Association42.64%
Uniform MBS2.67%
Cash and/or Derivatives0.44%
Country exposure
FieldValue
United States100.00%

ETF Risk-Adjusted Context

Risk and return-efficiency metrics sit beside fund structure rather than company financial statements.

AIQ Score
61/100

Composite research read.

Sharpe Ratio
-1.91

Return per unit of total volatility.

Sortino Ratio
—

Return per unit of downside volatility.

Max Drawdown
-8.07%

Largest trailing drawdown in the risk window.

Momentum
56/100

Trend and price behavior.

Value Exposure
45/100

Relative valuation/exposure context.

Risk
87/100

Volatility and downside resilience.

Annual Volatility
5.05%

Annualized realized volatility.

ETF analytics context
How to read MBB's ETF profile

Read cost, fund size, liquidity, holdings breadth, NAV, distribution yield, and exposure together. ETF analytics should not be judged by company-only fields such as revenue, EPS, margins, or payout ratio when those rows are not applicable.

Analysis tools

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See how ETF evidence contributes to the full analysis workspace.

How to Read a Fundamental Profile

Fundamental analysis is the discipline of estimating what a business is worth by examining the financial evidence it produces: how much it earns, how efficiently it converts revenue to cash, how much capital it uses to produce those earnings, and whether the current price compensates an investor for the risks of holding it. The metrics on this page are organized into six evidence buckets -- valuation, profitability, leverage, growth, efficiency, and company size -- because each bucket answers a different question. Valuation multiples answer whether the market price is cheap or expensive relative to underlying earnings power. Profitability answers whether the business model is inherently strong or thin. Leverage answers whether the balance sheet is durable under stress. No single ratio tells a complete story; the analysis is about how the full set hangs together.

The single most diagnostic question in fundamental analysis is whether a business generates returns on invested capital above its cost of capital. A business that earns 20% ROIC while its cost of capital is 9% is compounding value for shareholders at an 11-point spread -- and the market will typically pay a meaningful premium to book value for that privilege. A business that earns 8% ROIC against a 10% cost of capital is destroying economic value even if reported earnings are growing, because growth at below-cost returns dilutes per-share value rather than building it. This is why ROIC and gross margin -- which measures the inherent advantage in the product before overhead -- are the highest-signal fundamental metrics for evaluating business quality at the model level.

Valuation multiples (P/E, EV/EBITDA, P/S, P/FCF) measure what the market currently demands per unit of earnings, sales, or cash flow. They are not independently actionable: a low P/E can indicate value or distress, and a high P/E can indicate genuine quality or speculative excess. The interpretive work is contextual -- comparing a multiple to sector peers, to the company's own history, and to the underlying growth rate. The PEG ratio (P/E divided by earnings growth rate) is a simple first-order adjustment; EV/EBITDA is more reliable for cross-capital-structure comparisons because it normalizes for debt. FCF yield (FCF / market cap) is the cleanest single valuation signal for mature businesses because it is harder to manipulate than GAAP earnings.

Growth metrics deserve careful handling. Revenue growth that outpaces earnings growth signals margin compression -- revenue expansion without profitability improvement. EPS growth that outpaces revenue growth often reflects share buybacks rather than operational leverage, which is worth distinguishing. The highest-quality growth signature is expanding ROIC alongside revenue growth: the business is finding new markets without sacrificing the economics that made the existing business attractive. Declining ROIC with accelerating revenue growth is the opposite -- scale without economics, often the precursor to a valuation reset.

How to Read This Table

  • Valuation multiples (P/E, EV/EBITDA): Compare within sector and against the company's own 5-year history before concluding cheap or expensive.
  • ROIC vs WACC spread: The most important single quality signal. Sustained ROIC above cost of capital is the foundation of durable long-term returns.
  • Gross margin: Measures inherent product economics before overhead. Declining gross margin at scale is an early warning sign.
  • Debt-to-Equity and Interest Coverage: Frame balance sheet durability. Interest coverage below 3x reduces resilience in stress.
  • FCF yield: Divide trailing free cash flow by market cap. Yields above 4-5% are generally constructive; negative FCF yield requires a clear path to conversion.
  • Revenue growth vs. EPS growth: The gap between them tells you whether scale is creating or consuming margin.

These are analytical tools, not investment recommendations. Historical patterns do not guarantee future results.

MBB ETF Analytics FAQ

What is MBB's expense ratio?

MBB's expense ratio shows the annual fund cost when available. Compare it with holdings, tracking exposure, liquidity, dividend yield, and volatility.

What is MBB's dividend yield?

MBB's dividend or distribution yield helps investors compare income potential. It should be weighed against fund strategy, expense ratio, and risk.

How diversified is MBB?

MBB's diversification depends on holdings count, top-position concentration, and sector exposure. Fund size and liquidity do not automatically mean broad diversification.

Is MBB overvalued or undervalued?

ETF valuation depends on the valuation of its underlying holdings, sector exposure, and market regime. Use fund fundamentals with risk and technical context.