BIV vs SPAB

BIVAVanguard Intermediate-Term Bond ETF

SPABAState Street SPDR Portfolio Aggregate Bond ETF

In short

BIV Most bond funds hand you the entire market. BIV picks a lane: investment-grade U.S. government and corporate bonds in the 5-to-10-year band, sampled by Vanguard, priced at three basis points.

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.

Stated mandate

BIV The fund seeks to track a market-weighted bond index representing the intermediate-term investment-grade U.S. bond market. It uses index sampling and normally invests at least 80% of assets in securities represented by the index.

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.

Why people hold it

• BIV 0.03% a year against a category median around 0.36%. In bonds, where returns are mostly coupon math, cost is one of the few levers you fully control.
• You pick the maturity band instead of inheriting it. The benchmark is a 5-10 year government/credit index: no mortgage pools, no 30-year tail dragging the duration around.vanguard.com
• Running since 2007 and among the closest index trackers in its peer group, with the trading depth that comes from a multi-billion-dollar asset base.
• Pays income monthly and spreads it across roughly 300 investment-grade bonds, so no single issuer carries the paycheck.

• 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.

Worth knowing

• BIV Intermediate duration cuts both ways. A 5-10 year portfolio reprices harder when yields move than a short-term fund does. Rate sensitivity is the main risk you are taking here.
• This is a slice, not the whole bond market. Aggregate funds at the same 0.03% (BND, SPAB, SCHZ) also carry mortgage-backed and short and long maturities that BIV leaves out.
• Investment-grade only, U.S. only. No high-yield sleeve and no foreign bonds, which is the point of the design but caps what the income stream can come from.

• 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

Full BIV profile⁠

Full SPAB profile⁠