Summary
Index funds are often seen as the perfect investment for most people because they are simple and low-cost. The SPDR S&P 500 ETF Trust, commonly known by its ticker symbol SPY, is the oldest and most famous of these funds. However, many investors do not realize that SPY has a specific structural flaw that can lead to lower returns over time. While it remains a powerful tool for traders, long-term savers might find better value in newer versions of the same index.
Main Impact
The primary issue with SPY lies in its legal setup as a Unit Investment Trust (UIT). This older structure limits how the fund handles money, specifically when it comes to dividends and extra income. For a person investing for a few weeks or months, the impact is almost zero. But for someone holding the fund for twenty or thirty years, these small inefficiencies can result in losing out on thousands of dollars in potential growth compared to more modern competitors.
Key Details
What Happened
When SPY was created in 1993, it was the first exchange-traded fund (ETF) in the United States. Because it was a new idea, the creators used a legal structure called a Unit Investment Trust to satisfy government regulators. Newer S&P 500 funds, such as those offered by Vanguard or iShares, were built later using a more flexible "open-end fund" structure. This difference in "plumbing" is what creates the downside for SPY owners.
One major problem is "cash drag." When the 500 companies in the index pay dividends, SPY cannot immediately reinvest that money back into the stocks. Instead, it must hold that cash in a separate account that earns no interest until it is time to pay it out to the investors. In a market that is going up, having cash sitting idle means you are missing out on gains. Modern funds can reinvest those dividends right away, keeping more of your money working at all times.
Important Numbers and Facts
The cost of owning a fund is measured by its expense ratio. SPY has an expense ratio of about 0.0945%. While this is very low compared to old-fashioned mutual funds, it is much higher than its main rivals. For example, the Vanguard S&P 500 ETF (VOO) and the iShares Core S&P 500 ETF (IVV) both have expense ratios of just 0.03%. This means SPY is roughly three times more expensive to own every year.
Additionally, modern funds can earn extra money by lending out the shares they own to other investors for a small fee. This income is often used to lower the fund's overall costs. Because of its strict UIT rules, SPY is not allowed to participate in share lending. This is another way the fund misses out on small amounts of money that add up over time.
Background and Context
To understand why this matters, you have to look at how index funds work. An index fund does not try to pick "winning" stocks. Instead, it simply buys everything in a specific list, like the S&P 500, which tracks the largest companies in America. This strategy usually beats professional stock pickers because it has lower fees and less human error.
For decades, SPY was the only choice for people who wanted to trade the S&P 500 like a stock. It became the most "liquid" fund, meaning it is the easiest to buy and sell in massive amounts without changing the price. This makes it the favorite choice for big banks and professional traders who only hold the fund for a few hours or days. However, the needs of a professional trader are very different from the needs of a regular person saving for retirement.
Public or Industry Reaction
Financial advisors and investment experts have increasingly pointed out that SPY is no longer the best choice for "buy and hold" investors. While the fund is still respected for its history and size, the industry consensus is shifting. Many experts now suggest that individual investors should look at the specific legal structure of an ETF before putting their money into it. The shift toward lower-cost, more efficient funds like VOO and IVV has seen billions of dollars move away from older structures and into these newer options.
What This Means Going Forward
If you already own SPY in a taxable account, you should be careful about selling it just to switch to a cheaper fund. Selling could trigger a large tax bill that might cost more than what you would save in fees. However, for new investments or for money held inside a tax-free account like a 401(k) or an IRA, it often makes sense to choose the more efficient, lower-cost options.
Investors should expect SPY to remain the king of the trading world because of its high volume. But as more people learn about the hidden costs of the UIT structure, the gap between "trading funds" and "investing funds" will likely grow. It is a reminder that even in the world of simple index funds, the fine print matters.
Final Take
SPY changed the world of investing forever, but being the first does not always mean being the best. For the average person looking to grow their savings over many years, the small inefficiencies of the Unit Investment Trust structure are an unnecessary burden. By choosing a more modern fund with lower fees and better dividend handling, you can ensure that more of your money stays in your pocket rather than being lost to the fund's old-fashioned rules.
Frequently Asked Questions
Is SPY a bad investment?
No, SPY is still a very good investment compared to most high-fee mutual funds. However, it is slightly less efficient and more expensive than newer S&P 500 funds like VOO or IVV.
What is cash drag?
Cash drag happens when a fund holds cash from dividends instead of reinvesting it into stocks. If the stock market goes up while the fund is holding cash, the fund's total return will be slightly lower than the index it follows.
Should I sell my SPY shares to buy VOO?
It depends on your taxes. If you have to pay a lot of capital gains tax to sell SPY, it might be better to keep it. If you are in a tax-advantaged account like an IRA, switching to a lower-cost fund is usually a good idea.
