Generated October 3, 2026.
Overview
SPY and VOO are both ETFs that track the S&P 500 Index, holding the same 500 large-cap U.S. stocks in the same weights. Their pricing and slight operational differences create a meaningful gap in cost efficiency despite identical underlying exposure.
How they differ
The most significant difference is the expense ratio: VOO charges 0.03% versus SPY's 0.0945%, a gap of 0.06%. On a $100,000 position held for ten years, that difference compounds to roughly $945 in cumulative fees favoring VOO. VOO also holds more assets—$1041B compared to SPY's $817B—which may allow it to operate at lower per-share costs. The distribution rates differ slightly: VOO yields 1.03% while SPY yields 0.98%, though both pay quarterly. Both funds track the identical underlying index with a beta of 1.0, so performance before fees should be nearly identical.
Who each is best for
SPY: Investors with existing familiarity or trading integration with the SPDR ecosystem, or those who value the longest track record and highest trading volume for same-day execution. The 33 years-year history provides the longest real-world operating record.
VOO: Investors prioritizing cost efficiency over seniority, since the 0.03% expense ratio compounds meaningfully over decades.
Key risks to know
- Index concentration: Both funds replicate the S&P 500's sector and stock-level concentration; a severe downturn in mega-cap technology or financials directly impacts returns with no diversification benefit beyond the index itself.
- Market-cycle timing: Both funds track a trailing index with a one- to two-day lag; investors buying near market peaks capture that delay in rebalancing, though the effect is typically small.
- Tax treatment equivalence: Both are ETFs and offer in-kind creation/redemption, so tax efficiency should be comparable, but individual trading patterns and holding periods determine realized outcomes.
Bottom line
If you prioritize lowest long-term cost, VOO's 0.03% expense ratio and $1041B in assets create a structural advantage over SPY's 0.0945% fee. If you value the longest operating history and deepest trading liquidity in the broadest market, SPY's 33 years-year track record and massive share volume offer practical benefits. Both track identical index constituents, so the choice hinges on fee sensitivity and trading preferences rather than fundamentals. Past performance doesn't predict future results.
AI-generated analysis for educational purposes only. Verify important details independently; past performance does not guarantee future results.