ETFs (Exchange-Traded Funds)

Why it matters in retirement

ETFs made diversified, low-cost investing accessible to everyone. A single ETF can give you exposure to thousands of stocks for an annual fee of 0.03–0.20%. For retirees, that fee difference compounds into tens of thousands of dollars over 20+ years.

A Deeper Look

An ETF works like a mutual fund in that it holds a basket of investments, but it trades on a stock exchange throughout the day just like a single stock. When you place an order for an ETF, you buy or sell shares at the current market price, and the trade settles in one business day. Most ETFs passively track an index, meaning a computer replicates the holdings of a benchmark like the S&P 500 or the Bloomberg Aggregate Bond Index, with no human manager deciding what to buy or sell.

The ETF structure has a built in tax advantage that many investors do not realize. When investors want to sell, the ETF uses a process called in kind redemption that essentially swaps shares of the underlying stocks for ETF shares without triggering a taxable event for remaining shareholders. This means ETFs rarely distribute capital gains at year end, unlike mutual funds, which often generate unexpected tax bills. For retirees holding investments in taxable brokerage accounts, this tax efficiency can save thousands of dollars over a decade.

There are several major categories of ETFs to understand. Broad market equity ETFs track entire stock markets, like the total US market or total international market. Bond ETFs track indices of government, corporate, or municipal bonds. Sector ETFs focus on specific industries like technology or healthcare. Factor ETFs target characteristics like value, momentum, or low volatility. There are also commodity ETFs that track gold, oil, or other raw materials, and real estate ETFs that hold REITs. For most retirees, the first two categories, broad equity and broad bond, are all you need.

The cost differences between ETFs are dramatic and worth understanding. A total US stock market ETF from a major provider charges 0.03% per year, meaning you pay $3 annually for every $10,000 invested. A comparable actively managed mutual fund might charge 0.66%, or $66 per year. On a $500,000 portfolio over 20 years, assuming 7% annual returns, the difference in fees alone costs you roughly $60,000. That is real money that either stays in your pocket or goes to a fund company, and the actively managed fund is statistically unlikely to outperform the index over that period.

When building a retirement portfolio with ETFs, simplicity wins. A three fund approach covering total US stocks, total international stocks, and total US bonds gives you exposure to over 15,000 individual securities across the globe. You can adjust the ratio based on your risk tolerance and income needs. A retiree at 65 might hold 50% in a total stock ETF, 15% in an international stock ETF, and 35% in a bond ETF. As you age, you can gradually shift more toward bonds by selling stock ETF shares and buying bond ETF shares during your annual rebalance.

There are a few practical things to watch for when buying ETFs. Always check the expense ratio, and be skeptical of anything above 0.20% unless it is filling a very specific role. Look at the average daily trading volume; thinly traded ETFs have wider bid ask spreads, which cost you money on every trade. Avoid leveraged and inverse ETFs entirely. These are designed for single day returns and can produce devastating losses if held longer. A 2x leveraged S&P 500 ETF can lose money even when the S&P 500 goes up over the same period due to the mathematics of daily compounding. Finally, be cautious of thematic ETFs marketed around hot trends like artificial intelligence or cannabis. These tend to launch after the trend has already run up and often carry higher fees for concentrated, speculative exposure.

Common mistakes

• Paying 0.50%+ for a "smart beta" ETF instead of 0.03% for a plain index
• Buying leveraged/inverse ETFs expecting them to work long-term
• Ignoring bid-ask spreads on thinly traded ETFs
• Treating ETFs like trading vehicles instead of long-term holdings