SPYM vs VOO: Which Is the Better Pick in 2026?

Overview

SPYM and VOO are both ETFs tracking the S&P 500 Index, offering exposure to 500 of the largest U.S. companies. The key distinction is scale and issuer: VOO holds $1032B in assets under management versus SPYM's $157B, and it trades at a higher share price ($713.61 vs. $91.39). Both charge minimal fees and deliver nearly identical market returns, but they differ slightly in yield and expense ratios.

How they differ

VOO is roughly six times larger by AUM, which typically translates to tighter bid-ask spreads and lower trading costs for most investors. The expense ratio gap is razor-thin—VOO costs 0.03% annually while SPYM costs 0.02%—a difference of a single basis point. SPYM yields 1.05% compared to VOO's 1.10%, meaning VOO has historically distributed slightly more of its underlying dividends; over time, this gap compounds, though both are yielding well below the broad market's long-term average. Both charge quarterly distributions and track the identical index, so their core holdings and sector weights are functionally the same. The main practical difference is trading liquidity favoring VOO and VOO's marginally higher yield, offset by SPYM's fractionally lower expense ratio.

Who each is best for

SPYM: Fits investors seeking the lowest possible expense ratio on S&P 500 exposure, particularly those who trade infrequently or prefer smaller position sizes (the lower share price allows smaller dollar commitments).

VOO: Designed for investors who prioritize trading liquidity and tighter spreads, or those accumulating large positions where immediate execution at minimal cost matters; also fits investors who value the slightly higher historical yield distribution.

Key risks to know

• Both funds carry full equity market risk with a beta of 1.0, meaning they move in lockstep with broad U.S. large-cap volatility and downturns.
• Concentration in the largest 500 U.S. companies leaves both funds vulnerable to sector rotation and the cyclical nature of mega-cap valuations.
• VOO's significantly larger AUM can slow the fund's ability to liquidate large positions quickly during market stress, though this is not a practical constraint for most investors.
• Both are index funds, so they do not attempt to outperform—their returns will lag the S&P 500 by the amount of their fee, meaning SPYM will theoretically trail by 1 basis point annually compared to VOO.

Bottom line

The choice hinges on what you prioritize: SPYM's 0.02% expense ratio appeals to those focused on absolute cost minimization, while VOO's $1032B in AUM and marginally higher yield appeal to those seeking maximum liquidity and tighter trading conditions. For most buy-and-hold investors, the practical difference is negligible. Past performance does not predict future results.