AGG vs WSDB

AGGAiShares Core U.S. Aggregate Bond ETF

WSDBDWeitz Short Duration 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.

WSDB Weitz has run this short-duration credit playbook from Omaha since 1988. WSDB is the ETF version: active bond picking across credit qualities, with a duration target of one to three and a half years.

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.

WSDB The Fund seeks current income while preserving capital.

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.

• WSDB The ticker is new, the strategy isn't. Weitz has run this short-duration approach since 1988, when it started as a mutual fund, backed by a multi-billion-dollar bond platform.businesswire.com
• Duration stays short by design: a target average effective duration of one to three and a half years, muting price swings from rate moves versus intermediate and long bond funds.stockanalysis.combusinesswire.com
• Actively managed across the credit spectrum, from Treasuries and agency mortgages to corporate and securitized paper, aiming for current income while preserving capital.sec.gov

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.

• WSDB Costs 0.45% a year, above the typical bond fund in its cohort and far above index giants like BND, SPAB and SCHZ at 0.03%. Active credit work is the thing you're paying for.
• A 2026 launch with a small asset base and light trading, so bid-ask spreads can matter more than the expense ratio on a single trade.
• Short duration trims interest-rate risk, not credit risk: reaching into lower-rated corporate and securitized debt brings downgrade and default exposure.stockanalysis.comsec.gov

Full AGG profile⁠

Full WSDB profile⁠