VCLT vs IGLB: Which Long-Term Corporate Bond ETF Offers Investors Better Long-Term Prospects?

The iShares 10+ Year Investment Grade Corporate Bond ETF (NYSEMKT:IGLB) and Vanguard Long-Term Corporate Bond ETF (NASDAQ:VCLT) provide efficient exposure to long-dated corporate debt, differing primarily in their specific maturity targets and cost structures.

Both funds target the long end of the corporate credit curve, focusing on high-quality debt with maturities of 10 years or more. These instruments are particularly sensitive to interest rate fluctuations, making them primary tools for investors seeking to lock in yields or hedge against falling rates. While they share similar risk profiles, their underlying portfolios and expense structures provide slight points of differentiation for income seekers looking to optimize their fixed-income allocations in a volatile rate environment.

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-yr return represents total return over the trailing 12 months. Dividend yield is the trailing-12-month distribution yield as of the close of trading on Nov. 10, 2026.

Vanguard is slightly more affordable with a 0.03% expense ratio compared to 0.04% for iShares. Additionally, the Vanguard fund currently offers a higher payout, with a yield gap of 0.24 percentage points over its iShares competitor.

Performance & risk comparison

What's inside

The iShares 10+ Year Investment Grade Corporate Bond ETF mirrors high-quality, U.S. dollar-denominated corporate debt with remaining maturities exceeding 10 years. As a fixed income fund, it has no equity sector breakdown. Its portfolio is highly diversified across 3,811 holdings, and its largest positions include diversified corporate issuers where no single bond issue exceeds 0.29% of its assets under management (AUM). It launched in 2009. iShares 10+ Year Investment Grade Corporate Bond ETF has paid $2.64 per share over the trailing 12 months, which on its recent ~$45.77 share price works out to a 5.8% yield.

Vanguard Long-Term Corporate Bond ETF provides a consistent flow of income through investment-grade corporate bonds with weighted average maturities typically between 10 and 25 years. This fixed income fund offers no equity sector breakdown. It holds 2,864 positions, and its largest positions include high-quality corporate bonds where no single position exceeds 0.36% of its assets under management (AUM). While holding fewer individual issues than its peer, it remains robustly protected against individual issuer defaults through broad market representation. It launched in 2009. Vanguard Long-Term Corporate Bond ETF has paid $4.13 per share over the trailing 12 months, which on its recent ~$68.69 share price works out to a 6% yield.

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Which looks like the better buy?

Bonds are having a rough go of it in the market this year, but over time, they have proven to be a crucial part of a diversified portfolio. Each of these funds offers the safety of bonds with the income generation that debt paper is known for, but they have crucial differences to examine before investing.

IGLB, the iShares bond ETF, has an 11.36-year average duration in its portfolio, primarily from bonds from U.S. issuers, accounting for 82% of the portfolio, followed by the U.K. at 3.6%, and Canada at 2.2%.

Just 2.2% of the portfolio is dedicated to the top 10 holdings, which greatly reduces the concentration risk of any one bond in the portfolio. However, that figure doesn't account for the fact that positions can include multiple bonds from the same corporate issuer.

Over the past three years, IGLB has returned an annualized 6.8%, but a negative 3.2% over the five-year look-back. Over the prior decade, the ETF has returned 1.7%.

The Vanguard corporate bond fund examined here, VCLT, has an 11.62-year average duration, with 89% of the portfolio in U.S. issuers. Bonds from issuers in the U.K. (3.,2%), Canada (2.2%), and Belgium (1.1%) are also noteworthy. About 2.8% of the portfolio sits in the top 10 holdings, which means there's not much risk to the portfolio from any single bond. However, there can be multiple bonds from the same issuer in the portfolio, which can carry a hard-to-spot issuer risk.

Performance-wise, VCLT has returned investors an annualized 6.7% over the past three years, a negative 3.4% over the past five years, and a positive 1.7% over the past decade.

Based on performance, these funds are very close. We give the nod to Vanguard's VCLT for its very slight expense ratio advantage over IGLB. Over the long term, lower expenses should equate to better returns.

Brendan Coffey 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.