Vanguard Long-Term Bond ETF (BLV) seeks to track the Bloomberg U.S. Long Government/Credit Float Adjusted Index, which measures the performance of U.S. investment-grade bonds with maturities greater than 10 years, including both government Treasury bonds and high-quality corporate debt securities.
How It Works
BLV uses a passively managed, market-value-weighted approach that holds bonds in proportion to their outstanding debt amounts. The fund maintains a dollar-weighted average maturity of 20+ years and focuses exclusively on investment-grade securities rated BBB or higher. Rebalancing occurs monthly to reflect new bond issuances, maturities, and credit rating changes. The portfolio typically holds 2,000+ individual bonds split between U.S. Treasuries and corporate bonds from established companies.
Key Features
- Ultra-low 0.04% expense ratio makes it one of the cheapest ways to access long-term bond exposure
- High duration of 15+ years amplifies both gains and losses from interest rate movements compared to shorter-term bonds
- Strong credit quality with 70% government bonds and 30% investment-grade corporate bonds rated A or higher
Risks
- This ETF can lose significant value when interest rates rise, potentially declining 15-20% for each 1% rate increase due to long duration
- Credit risk exists if corporate bond issuers face financial distress, though investment-grade focus limits default probability to under 1% annually
- Inflation erodes purchasing power of fixed bond payments, making this ETF vulnerable during periods of rising consumer prices
Who Should Own This
Best suited for conservative investors with 10+ year time horizons seeking steady income and portfolio diversification from stocks. Low-to-medium risk tolerance required due to interest rate sensitivity. Works as 10-30% allocation in retirement portfolios or as defensive holding during economic uncertainty, particularly when rates are expected to decline.