DIA vs VOO: Which ETF Is Better in 2026?

What each is for. DIA tracks Dow Jones Industrial Average and VOO tracks S&P 500. These play different roles in a portfolio, so the useful question is what job you are hiring each for, not which has the better recent chart.

Income. DIA yields about ~1.6% and VOO about ~1.0% (early 2026). DIA pays more income, which matters if you are drawing from the portfolio; the other leans toward price growth.

Cost. 0.16% vs 0.03% ($16 vs $3 on $10,000 a year).

The label is the same; the portfolio is not. Their top holdings overlap about 6% by weight (1 shared names: MSFT). They share a theme but hold largely different names, so they are more complementary than interchangeable.

Overlap reflects top holdings by weight (an approximation of full-fund overlap), as of early 2026. Verify full holdings with each issuer.

DIA tracks Dow Jones Industrial Average, and VOO tracks S&P 500. Because they follow different benchmarks, the two funds screen and weight their holdings differently, and that is what produces any gap in exposure, concentration, and return between them.

On construction, DIA is market-cap-weighted and VOO is market-cap-weighted. They share a weighting approach, so any difference comes from the underlying index rather than the method.

So these two are answering different questions about your portfolio, which is why the choice is usually how much of each to hold rather than one instead of the other.

VOO is the cheaper fund at 0.03% versus 0.16%, a gap of about $13 a year on a $10,000 holding. Because these funds hold different things, the cheaper fee is only one input; the exposure difference usually matters more than the cost gap.

On scale, DIA holds about ~$38 billion and VOO about ~$1.7 trillion. Larger funds generally trade at tighter bid-ask spreads and carry deeper options markets, which matters if you trade actively or in size; for buy-and-hold investors it rarely changes the outcome. DIA currently pays the higher dividend yield (~1.6% versus ~1.0%), which shifts more of its return into cash today.

These are complements, not rivals, so most investors hold both in different roles rather than choosing one. The broader or steadier fund typically works as a larger core position, while DIA, with its higher ~1.6% yield, suits a smaller satellite role for investors who specifically want that income or exposure. An income-focused or drawdown-sensitive investor weights toward the higher-yield side; a growth-focused, long-horizon investor weights toward the broader one.

These are descriptive profiles, not recommendations. What fits you depends on your goals, horizon, and what you already own. Walnut is not an investment adviser.

The overlap that decides most ETF purchases is not between DIA and VOO, it is with what you already hold. ETF redundancy is invisible without looking through to the underlying holdings: you can already own most of DIA inside a broad fund like an S&P 500 or total-market ETF and not realize it.

This is the part a generic comparison cannot answer, because it depends on your account. Connect your brokerage and Walnut looks through your funds to show your real, combined exposure, flags how much of DIA or VOO you already own elsewhere, and tells you whether adding either just buys the same companies twice, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Tracks the Dow Jones Industrial Average, 30 large, established US companies. Unusually, the index is price-weighted rather than market-cap-weighted, so higher-priced shares carry more influence. More concentrated and less technology-heavy than the S&P 500. Verify current figures on the issuer's site.

Full DIA guide

Tracks the S&P 500 Index, the standard measure of US large-cap equity. Effectively identical exposure to SPY and IVV at a 0.03% expense ratio. Used as a core building block in most diversified portfolios.

Full VOO guide

These are complements, not rivals. Most investors hold the broader or lower-risk fund as a larger core and use the narrower or higher-yield one as a smaller satellite sized to the role they want it to play, rather than picking one and dropping the other. Decide the split deliberately.

For the full detail, see the DIA and VOO guides.

Approximate as of early 2026; verify with each issuer.

State Street SPDR launched the first US ETF and runs many sector funds. Vanguard is investor-owned and known for rock-bottom fees.

DIA and VOO are different exposures, so the question is how much of each, not which is better. Either way, the decisive check is overlap with your real portfolio. Walnut can show that before you buy. It is not an investment adviser.

Both funds lean on GS, so understanding that one company explains a lot of what drives either ETF.