Choosing Between BND and AGG: A Practical Guide to Today's Top Bond Funds

When it comes to building a stable income stream through bond funds, two names consistently dominate investor portfolios: Vanguard’s BND and iShares’ AGG. Both are massive, widely-traded ETFs that track the U.S. investment-grade bond market, but they’re not identical twins—and understanding their differences could matter for your financial plan.

The basic reality is straightforward: both bond funds offer near-zero fees and solid yields, yet they take slightly different approaches to what bonds they hold. One skews safer, the other offers a bit more income potential. Let’s break down what actually separates them.

Size, Cost, and Income: The Numbers Match Up

Here’s the headline: BND and AGG charge the same 0.03% expense ratio, making them incredibly cheap to own. That’s penny-pinching at its finest in the fund world.

What’s more interesting is their recent dividend performance. As of late January 2026, AGG’s current share price sits at $100.11, while BND trades at $74.25. Both funds distribute monthly—a nice feature if you prefer frequent income hits rather than waiting for quarterly payouts. BND delivers a 3.85% yield, and AGG kicks in 3.88%, almost identical across the board.

When you look at assets under management, BND massively outpaces AGG with $384.63 billion versus $136.5 billion. That size advantage means BND likely has better liquidity and tighter bid-ask spreads, making it easier to buy and sell without slippage.

Performance Over Five Years: Nearly a Tie

Over the trailing five years, both bond funds experienced similar drawdowns—a peak-to-trough decline of roughly 18% for each. That shouldn’t surprise you: when the bond market cratered in 2022 (arguably the worst year in U.S. history for fixed income), both funds got hit equally hard.

The recovery? Modest but consistent. A hypothetical $1,000 investment five years ago would have grown to $852 in BND and $857 in AGG by late January 2026. That’s basically equivalent performance. The takeaway: these two move in lockstep because they’re essentially tracking the same market.

Where They Diverge: Credit Quality Matters

Here’s where the real differentiation kicks in. AGG holds approximately 74% of its bonds in AA-rated securities—the second-highest safety rating bonds can achieve. BND, meanwhile, concentrates about 72% of its holdings in AAA-rated bonds, the highest possible rating.

That might sound like a small distinction, but it shapes the entire risk-reward profile. Both ETFs carry roughly 50% U.S. government bonds, which are effectively default-free. The gap emerges in the higher-quality corporate segment. AGG’s willingness to hold more AA-rated (rather than AAA-rated) bonds means it’s adding slightly more credit risk to chase additional yield.

Is AA-rated dangerous? Not remotely. AA bonds rarely default. But AAA bonds default even less often, making BND the technically “safer” choice. AGG, conversely, offers that extra fractional yield precisely because it takes on marginally more credit risk.

Which Bond Fund Deserves Your Money?

The decision ultimately hinges on your risk tolerance and yield hunger. BND appeals to conservative investors prioritizing capital preservation—fewer sleepless nights, more AAA safety. AGG works for investors comfortable with a sliver more risk in exchange for slightly better income.

For most people? The differences are negligible enough that either bond fund serves as a perfectly adequate core holding for diversification and steady income. Transaction costs are identical, yields are nearly identical, and long-term performance tracks together.

The real consideration is patience. Bond funds endured a devastating 2022, and the climb back remains gradual. Don’t expect explosive gains. Instead, expect steady distributions, predictable volatility around 0.27 beta, and reliable diversification for the fixed-income sleeve of your portfolio.

Monthly dividend payments from either fund make them appealing for income-focused investors tired of quarterly distributions. Pick the one that suits your risk stance, contribute consistently, and let compounding do its job.