VGIT vs. IGIB: Which Bond ETF Offers the Better Buy for Income Investors?

The Vanguard Intermediate-Term Treasury ETF (NASDAQ:VGIT) and the iShares 5-10 Year Investment Grade Corporate Bond ETF (NASDAQ:IGIB) differ in their underlying credit risk and yield potential -- one holds government-backed debt, while the other focuses on investment-grade corporate bonds.

Both funds target the middle of the yield curve to balance income and interest rate risk. But whereas VGIT prioritizes the safety and liquidity of government obligations for more conservative portfolios, IGIB tracks corporate debt, which offers higher yields.

Snapshot (cost & size)

Beta measures price volatility relative to the S&P 500; beta is calculated from monthly returns over the available fund history (up to five years). The 1-year return represents total return over the trailing 12 months. Dividend yield is the trailing-12-month distribution yield.

VGIT is the slightly cheaper option, with a 0.03% expense ratio compared to IGIB's 0.04%. IGIB, however, offers a dividend yield that's a full percentage point higher than VGIT.

Performance & risk comparison

What's inside

Launched in 2009, VGIT focuses on sovereign debt, primarily holding U.S. Treasury bonds with maturities between three and 10 years. This sovereign focus provides a consistent income stream while carrying a moderate level of interest rate sensitivity. The fund holds 103 positions, and its largest holdings include the U.S. Treasury Note/Bond 4.63% 02/15/2035 at 1.9%, the U.S. Treasury Note/Bond 4.38% 05/15/2034 at 1.9%, and the U.S. Treasury Note/Bond 4.25% 11/15/2034 at 1.9%.

IGIB focuses on high-quality corporate debt securities with maturities ranging from five to 10 years. The portfolio includes 3,023 holdings, ensuring that no single fixed income position exceeds 0.23% of total assets. This broad diversification helps mitigate the default risk of any individual corporation. IGIB was launched in 2007.

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Which looks like the better buy

There's no universal winner here -- VGIT and IGIB are built for different jobs, and the better buy really depends on what an investor needs their bond allocation to do.

VGIT is the more defensive choice. Because it holds only U.S. government debt, it carries essentially no credit risk -- and its lower beta means smaller price swings when markets get choppy. That stability comes at a cost, though: a lower yield, currently around 3.9%. Investors leaning on VGIT are typically prioritizing capital preservation over maximizing income. It's the kind of holding that can provide much-needed ballast for a stock-heavy portfolio.

IGIB, by contrast, takes on modest additional credit risk by lending to corporations rather than the government, and it's compensated with a notably higher yield of roughly 4.9% -- contributing to its stronger one- and five-year returns. Its 3,000+ holdings keep company-specific risk extremely low. IGIB is making a bet that investment-grade corporate America, broadly, can keep paying its bills. That's normally a reasonable bet in a healthy economy, but corporate bonds tend to underperform Treasurys when recession fears spike, which is worth remembering during volatile stretches.

For investors, the choice often comes down to time horizon and risk tolerance. Those wanting the smoothest ride and the strongest cushion for stock market drawdowns may lean toward VGIT. Investors comfortable with slightly more risk in exchange for extra yield -- and who believe credit markets will stay calm -- may find IGIB the better fit. Another reasonable approach is to use both funds, pairing Treasurys for stability with corporate bonds for higher yield.

Andy Gould has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.