How to Invest in the S&P 500 (2026): VOO vs SPY vs IVV Compared

The three largest S&P 500 ETFs all track the same 500 companies but differ meaningfully in cost and structure. For most buy-and-hold investors in taxable accounts, the choice is between VOO (Vanguard) and IVV (iShares), both charging 0.03% annually; SPY (State Street SPDR), charging 0.0945%, makes sense primarily for active traders and options users. The cost difference sounds small but compounds significantly over decades.

The Real Cost of Ownership

The difference between a 0.03% expense ratio and 0.0945% is often dismissed as trivial until you do the math. On a $10,000 investment, you pay $3 annually with VOO or IVV, compared to $9.45 with SPY, a difference of $6.45 per year. That gap widens at larger balances: a $100,000 account costs $30 per year with the low-fee funds versus $94.50 with SPY.

Over a 30-year holding period in a rising market, that cost difference adds up to approximately $1,400 in lost returns versus holding VOO or IVV. For a $100,000 initial investment, the gap approaches $5,000. These calculations assume compounding at historical S&P 500 returns and no additional contributions. In reality, most investors add to their positions regularly, meaning the total drag is often larger.

As of August 3, 2026, the five-year annualized returns were nearly identical: VOO returned 12.76%, IVV returned 12.75%, and SPY returned 12.68%. The slight performance gap attributable to fees demonstrates how cost discipline pays off even over shorter timeframes.

How VOO and IVV Differ from SPY Structurally

VOO and IVV are organized as open-end funds, the same legal structure as a traditional mutual fund. They can reinvest dividends immediately upon receipt from their holdings, keeping capital fully invested at all times. Over long periods in a rising market, this structural advantage adds a small but compounding benefit.

SPY, by contrast, is a Unit Investment Trust (UIT), a legal structure from the 1930s. Under UIT rules, SPY cannot reinvest dividends received from its holdings; instead, dividends are held in a non-interest-bearing cash account and distributed to shareholders quarterly. This creates a small but real performance drag called "dividend drag." The cash sits uninvested for weeks until distribution, earning nothing while the market moves. It is a structural disadvantage that lower-cost alternatives avoid entirely.

Where the Brokers Stand

All three ETFs are available at virtually every major online brokerage with no commission on trades. The entry fee is not a consideration anymore; the ongoing expense ratio is what matters.

Liquidity and the Options Factor

For most buy-and-hold investors placing regular monthly purchases, liquidity differences are irrelevant. If you're placing a market order to buy $5,000 of an S&P 500 ETF once a month in your brokerage account, the bid-ask spread difference between SPY, VOO, and IVV is fractions of a cent, and it won't affect your returns in any meaningful way.

However, for institutional traders and anyone using options strategies, the equation reverses. SPY's liquidity and options ecosystem around SPY is unmatched. SPY's trading volume in dollar terms was more than 8 times that of Vanguard S&P 500 ETF over the three months through February 2026, despite SPY being smaller in assets. For any investor whose strategy involves covered calls, protective puts, cash-secured puts, or any other options overlay, SPY is the only practical choice. The higher expense ratio is a reasonable price to pay for access to the world's most liquid derivatives market.

Tax Efficiency in Taxable Accounts

ETFs use an in-kind creation and redemption mechanism that generally avoids triggering capital gains distributions, giving them a tax efficiency edge. None of the four major S&P 500 ETFs (VOO, IVV, SPY, and the SPDR Portfolio S&P 500 ETF) have paid out capital gains distributions in the past 10 years. This structural feature means you won't face unexpected year-end tax surprises from the fund's internal trading activity.

For retirement accounts like IRAs and 401(k)s, this distinction is moot. There is virtually no difference between the vehicles for investors in nontaxable accounts, assuming all distributions are reinvested. In fact, investors often don't have a choice between multiple S&P 500 funds in their retirement plans; the plan offers what it offers, usually a single low-cost institutional share class.

How to Think About Your Choice

Picking a fund with the lowest fee is the best option for most long-term investors, and taxable investors should lean toward ETFs because of their tax advantage. If you're a buy-and-hold investor without an options strategy, VOO and IVV are functionally identical. The choice between them is personal preference; both have massive asset bases, both charge the same rate, and both are available everywhere. What you should not do is hold SPY in a taxable account for 30 years when VOO or IVV would do the same job for one-third the cost.

You can use MinMaxDoc to compare your holdings against the fund's constituents and understand what risks and exposures you already own, helping you decide whether broad S&P 500 exposure is the right fit for your portfolio or whether you need different pieces of the market.

FAQ: How People Search for This

What is the cheapest S&P 500 ETF to buy? VOO and IVV both charge 0.03% annually, which is the lowest available for an S&P 500 ETF. On a $10,000 investment, that's $3 per year versus $9.45 for SPY.

Which S&P 500 ETF should I buy for a long-term buy-and-hold portfolio? VOO or IVV are the standard choice. Both are open-end funds with identical expense ratios, massive liquidity, and excellent tax efficiency. The structural advantage of reinvesting dividends immediately makes them superior to SPY for long-term holding in taxable accounts.

Is SPY worth buying if I'm not an options trader? Probably not. SPY's higher expense ratio and dividend-drag structure make it costlier over time. Unless you plan to use options strategies or want to trade actively, VOO or IVV will serve you better.

Can I hold all three ETFs to diversify? No. All three track the exact same 500 companies, so holding all three provides no additional diversification. You would simply tie up capital that could be invested elsewhere and pay multiple expense ratios for the same underlying exposure.

Disclaimer: This content is for educational and informational purposes only and does not constitute financial, investment, or tax advice. The information presented reflects the author's opinions and analysis at the time of writing and may not be suitable for your individual circumstances. Always consult with a qualified financial advisor before making investment decisions. Past performance is not indicative of future results. MinMaxDoc and its authors are not registered investment advisors.