SPAB vs WCPB

SPABAState Street SPDR Portfolio Aggregate Bond ETF

WCPBBWeitz Core Plus 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.

WCPB Weitz has been an independent Omaha shop since 1983. In 2025 it put its fixed income playbook in an ETF: an actively run core bond portfolio that hunts income in the mortgage and asset-backed corners the Agg leaves thin.

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.

WCPB The fund's primary objectives are current income and capital preservation.

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.

• WCPB Built to roam where the Agg does not. The fund's own materials point to agency and non-agency mortgages, asset-backed paper and select corporate credit as the "plus" in core plus.weitzinvestments.com
• Income comes first in the mandate: current income and capital preservation are the stated objectives, and cash goes out monthly.
• Not a new idea in a new wrapper. Weitz runs the same research-driven fixed income process it has used in its mutual funds, and the ETF discloses its holdings daily.businesswire.comweitzinvestments.com
• What sits in the portfolio lines up closely with the income-and-preservation mandate on the label, which is not a given among active bond funds.

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

• WCPB 0.45% a year sits above the 0.36% category median and far above 0.03% index trackers like BND and SPAB. You are paying for active judgment, not index replication.
• It opened in August 2025, so the record is short and trading is lighter than the category's giants, which can mean wider spreads on the way in and out.
• Stepping outside the Agg into structured credit means results can diverge from a plain aggregate index fund, in either direction.weitzinvestments.com

Full SPAB profile⁠

Full WCPB profile⁠