Two Giants Tracking the Same Index

When comparing the Vanguard S&P 500 ETF (VOO) and the SPDR S&P 500 ETF Trust (SPY), investors are essentially choosing between two of the most popular ways to gain exposure to America’s largest companies.

Both funds track the S&P 500 Index and hold nearly identical portfolios consisting of the nation’s leading large-cap stocks. As a result, long-term performance between the two funds tends to be extremely similar.

The S&P 500 remains the most widely followed stock market index globally and serves as the benchmark for countless active and passive investment strategies.

Inside SPY

The SPDR S&P 500 ETF Trust was launched in 1993 and holds the distinction of being the first exchange-traded fund listed in the United States.

Today, SPY holds approximately 503 positions and remains one of the largest and most heavily traded ETFs in the world.

Technology represents the fund’s largest sector allocation at 39.05%, followed by Financial Services at 11.07% and Communication Services at 10.64%.

Its largest holdings include Nvidia at 7.98%, Apple at 6.96%, and Microsoft at 4.81%, reflecting the growing influence of mega-cap technology companies within the broader market.

Over the past 12 months, SPY distributed approximately $7.38 per share in dividends to shareholders.

What Makes VOO Different?

VOO tracks the same index and owns virtually the same companies as SPY.

The primary advantage for Vanguard’s ETF is its lower expense ratio, which allows investors to retain slightly more of their returns over time.

While the performance difference is often small on an annual basis, lower fees can create meaningful advantages over decades through the power of compounding.

VOO is also structured as a traditional open-end ETF, whereas SPY operates as a unit investment trust. This difference slightly affects how dividends are handled and reinvested, although the impact for most investors is relatively minor.

Performance Is Nearly Identical

Because both funds mirror the same benchmark, investors should not expect dramatic differences in returns.

The portfolios, sector allocations, and underlying holdings are nearly identical, resulting in performance that closely tracks one another year after year.

Any long-term advantage generally comes from VOO’s lower expenses rather than differences in stock selection.

Liquidity Favors SPY

SPY’s greatest advantage remains its unmatched liquidity.

The ETF regularly trades billions of dollars in volume daily, making it a preferred choice for institutional investors, hedge funds, professional traders, and options market participants.

The ability to enter and exit positions quickly with minimal trading friction makes SPY one of the most efficient trading vehicles available in financial markets.

For active traders, this liquidity can often outweigh the slightly higher expense ratio.

Which Fund Is the Better Buy?

For most long-term investors, VOO is likely the better choice.

Its lower cost structure allows investors to maximize returns while maintaining full exposure to the S&P 500. Retirement investors, passive index investors, and those focused on long-term wealth accumulation often prefer Vanguard’s offering for this reason.

SPY remains an excellent alternative and continues to dominate among traders and institutions that value liquidity and active market participation.

The Bottom Line

Both VOO and SPY rank among the best ETFs available for gaining exposure to the U.S. stock market.

Investors seeking a core long-term holding will generally benefit from VOO’s lower expenses and efficient structure.

Those who actively trade, use options strategies, or require the deepest liquidity available may find SPY better suited to their needs.

For the majority of buy-and-hold investors, however, VOO’s lower fees provide a small but meaningful advantage that can compound over time while delivering virtually identical market exposure.