Which S&P 500 ETF is best?
Choose from use case, not a universal ranking. SPYM had the lowest verified expense ratio in this four-fund comparison at 0.02%. VOO and IVV were close at 0.03%. SPY cost more at 0.0945% but has a long-established trading and options ecosystem. A buy-and-hold investor and an options trader are solving different problems.
S&P 500 ETF comparison
| ETF | Name | Expense ratio | Potential use | Data source |
|---|---|---|---|---|
| VOO | Vanguard S&P 500 ETF | 0.03% | Low-cost long-term S&P 500 exposure | 2026-04-28 prospectus |
| IVV | iShares Core S&P 500 ETF | 0.03% | Low-cost long-term S&P 500 exposure | Current prospectus |
| SPY | State Street SPDR S&P 500 ETF Trust | 0.0945% | Established trading and options ecosystem | 2026-08-27 issuer page |
| SPYM | State Street SPDR Portfolio S&P 500 ETF | 0.02% | Lowest verified expense ratio in this comparison | 2026-08-27 issuer page |
What the expense ratios mean on $10,000
| Expense ratio | Approximate annual fund expense |
|---|---|
| 0.02% | $2 |
| 0.03% | $3 |
| 0.0945% | $9.45 |
The account value is held constant for illustration. Actual expenses vary as fund value changes. Brokerage commissions, spreads, premiums or discounts and taxes are separate.
How to choose among VOO, IVV, SPY and SPYM
For long-term core exposure
Start with expense ratio, then check the prospectus, median bid-ask spread, platform availability and whether changing from an existing holding would realize a taxable gain. A one-basis-point difference equals roughly $1 per year for each $10,000 before market changes.
For frequent or options trading
Trading volume, spread, options depth and execution matter more to an active trader. Those figures change, so check the live issuer and exchange data rather than relying on a static article.
If you already own one
Switching between funds that target the same index may produce only a small exposure change while creating taxes and trading costs. Compare the actual benefit before selling.
Still deciding between the S&P 500 and the whole U.S. market? Read VOO vs VTI. For the lowest-fee angle, see the cheapest S&P 500 ETF guide.
What an S&P 500 ETF does not solve
The S&P 500 measures U.S. large-cap stocks and represents about 80% of available U.S. market capitalization according to S&P Dow Jones Indices. It does not provide dedicated international stocks, bonds or complete U.S. small-cap exposure. Market-cap weighting also gives the largest companies the greatest influence.
ETF shares can trade above or below net asset value. Investor.gov recommends checking the prospectus, holdings, premium or discount and median bid-ask spread before investing.
Frequently Asked Questions
There is no universal winner. VOO and IVV both listed 0.03% expense ratios in the sources checked, while SPYM listed 0.02%. Compare fund structure, spread, platform availability and tax consequences rather than choosing from a ranking badge.
SPYM listed a 0.02% gross expense ratio on August 27, 2026. VOO and IVV listed 0.03%, while SPY listed 0.0945%. Verify the current prospectus before acting.
All four seek returns tied to the S&P 500, but their holdings, cash positions, tracking difference, structure and trading characteristics can vary. Identical index exposure does not make every implementation identical.
Disclaimer: Educational content, not individualized investment, tax or legal advice.