SPAB vs WSDB

SPABAState Street SPDR Portfolio Aggregate Bond ETF

WSDBDWeitz Short Duration Bond ETF

In short

SPAB A 2007-vintage core bond fund priced at 0.03%: roughly 8,500 US investment-grade bonds in one ticket, at the same rock-bottom fee the household names charge for the same index.

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

SPAB The fund seeks to track the price and yield performance of the Bloomberg U.S. Aggregate Bond Index before fees and expenses, providing broad exposure to U.S.-dollar-denominated investment-grade bonds.

WSDB The Fund seeks current income while preserving capital.

Why people hold it

• SPAB 0.03% a year against a 0.36% median for its peer group, and the same ticket price as AGG, SCHZ and BBAG on the identical index.
• Roughly 8,500 dollar-denominated investment-grade bonds in one line item, tracking the Bloomberg U.S. Aggregate Bond Index. Diversification you could not assemble bond by bond.ssga.com
• Trades actively and has tracked its index closely, putting it among the stronger implementations in the core-bond group.
• Running since 2007, now a multi-billion-dollar fund, and it pays monthly rather than quarterly.

• 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

• SPAB Bond prices move opposite yields. When rates rise the index falls and the fund follows it down; a 0.03% fee cannot cushion that.
• AGG, SCHZ and BBAG hold the same declared index at the same 0.03%. Picking among them comes down to spreads and platform, not the portfolio.
• Investment grade and US dollar only by mandate: high yield and foreign-currency debt sit outside the remit.ssga.com

• 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 SPAB profile⁠

Full WSDB profile⁠