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ETF of the Week · Sep 15, 2026
AGGBlackRock (iShares)Passive / Index

iShares Core U.S. Aggregate Bond ETF

Broad exposure to U.S. investment-grade bonds, including Treasuries, corporate bonds, and mortgage-backed securities.

Why This Week?

AGG is the quintessential fixed-income allocation for a diversified portfolio. It tracks the entire U.S. investment-grade bond market, providing stability, capital preservation, and regular income. It acts as the 'ballast' to equity volatility in standard 60/40 portfolios.

Key Metrics

Effective Duration
~6.2 yrs
Expense Ratio
0.03%
AUM
$120B+

Top Holdings

3 holdings shown. Weights are approximate.

#NameWeight
1
TREASURYU.S. Treasuries
~42%
2
MBSMortgage-Backed Securities
~27%
3
CORPIndustrial Corporate Bonds
~15%

Pros & Cons

Strengths

  • Core fixed-income building block.
  • Very low expense ratio (0.03%).
  • High credit quality (mostly AAA to A rated).

Risks & Weaknesses

  • Interest rate risk (duration of ~6.2 years means prices drop when rates rise).
  • Lower yields compared to high-yield (junk) bonds.
  • Excludes inflation-protected bonds (TIPS).

Alternatives Comparison

ETFNameTER
AGGThis WeekiShares Core U.S. Aggregate Bond ETF0.03%
BNDVanguard Total Bond Market ETF0.03%
TLTiShares 20+ Year Treasury Bond ETF0.15%

💬 Frequently Asked Questions

Very little. They track similar broad U.S. bond market indices and have the same 0.03% expense ratio. For the average investor, they are functionally interchangeable.

Want to Explore Further?

AGG launched recently, so try backtesting SMH or SOXX as semiconductor proxies, or explore our ETF database for alternatives.

Disclaimer: ETF of the Week is educational content only. It is not investment advice, a recommendation to buy or sell, or an endorsement of any fund. Past performance does not guarantee future results. Always do your own research and consult a financial advisor before investing.