AGG vs BYLD

AGGAiShares Core U.S. Aggregate Bond ETF

BYLDBiShares Yield Optimized Bond ETF

In short

AGG Launched in 2003, one of the first funds to pack the entire U.S. investment-grade bond market into a single ticker: Treasuries, corporates and mortgage bonds, three basis points a year, cash paid monthly.

BYLD Most core bond funds buy the whole market and take whatever yield falls out. BYLD tracks an index built from other iShares bond funds, tilted toward the higher-income corners of US fixed income, and pays monthly.

Stated mandate

AGG The fund seeks to track the Bloomberg U.S. Aggregate Bond Index, providing broad exposure to the total U.S. investment-grade bond market.

BYLD The fund seeks to track the Morningstar U.S. Bond Market Yield-Optimized Index, which targets high-yielding U.S. fixed-income securities and provides diversified bond exposure.

Why people hold it

• AGG 0.03% a year against a peer-group median near 0.36%. On a bond fund, the fee comes straight out of the coupon, so the gap matters more than it looks.
• A $100 billion-plus fund and very actively traded, the kind of depth that keeps bid-ask costs down for retail-sized orders.
• Tracks the Bloomberg U.S. Aggregate closely, with one of the tightest index-following records in its peer group. Income is distributed monthly.
• Running since 2003, giving it one of the longest track records among U.S. bond index ETFs.

• BYLD One ticker, many sleeves. The index is assembled from underlying fixed income funds picked to deliver current income, so the blending happens inside the wrapper.blackrock.com
• Income lands monthly, not quarterly, which lines up with how most household bills arrive.
• The portfolio is spread widely across the bond market and hews closely to its stated index, so what you buy matches what the label says.
• Trading since 2014 under the iShares roof, it sits in the upper half of a crowded aggregate-bond peer group on our review.

Worth knowing

• AGG Investment grade and U.S. dollar only. High-yield debt and foreign bonds sit outside the mandate, so this is designed as core ballast rather than a yield hunt.
• Rate risk comes as it comes. The index gets tracked whether yields rise or fall, with no manager stepping in to shorten duration.
• The same index is sold by SPAB, SCHZ and BBAG at the same 0.03%. The portfolio is the commodity here; scale and trading depth are the tiebreakers.

• BYLD The 0.41% fee is above the typical fund in this category and well above the 0.03% charged by core index staples like BND, SPAB and SCHZ.
• Targeting higher-yielding bonds means leaning on credit, so it carries different risks than a plain market-weighted aggregate index fund.
• Volume is moderate rather than enormous. Limit orders and a look at the spread are worth the extra second.

Full AGG profile⁠

Full BYLD profile⁠