WalletPrep worksheet · Investing
What is an index fund, and why do fees matter so much?
Name ____________________ Date __________
Key ideas
- The expense ratio is a yearly fee. A 0.05% fee costs $5 a year on $10,000. A 1% fee costs $100 on the same balance.
- Small fee gaps add up over decades. At an assumed 7% before fees, 30 years of a 1% fee leaves $361,580, versus $442,364 at 0.05%.
- Index funds can still lose money. They rise and fall with the market. Money you need within about 5 years belongs in savings, not stocks.
Vocabulary
- Index fund
- A mutual fund or ETF that tries to match a market index by holding the investments in it, rather than picking winners.
- Stock
- A small piece of ownership in a company. Its price rises and falls with how investors value the business.
- Bond
- A loan you make to a government or company. It pays you interest and returns your money on a set date, called the maturity date.
- Expense ratio
- The yearly fee a fund charges, shown as a percentage of what you have invested in it. It comes out of the fund automatically.
- Assets
- Things you own that have money value, like cash, savings, retirement accounts, investments, a home or a car.
- Diversification
- Spreading your money across many investments so that one bad company or sector does less damage to the whole.
Work it out
Priya, 30, invests $10,000 plus $300 a month for 30 years. She compares an index fund with a 0.05% fee and a fund whose managers pick stocks, at a 1% fee, assuming 7% before fees.
- Total put in (either fund)
- Return after a 0.05% fee
- Return after a 1% fee
- Balance after 30 years at 6.95%
- Balance after 30 years at 6%
- Cost of the higher fee
Check yourself
You have $20,000 in a fund with a 0.5% expense ratio. About how much does the fund take in fees this year?
- A. $10
- B. $100
- C. $1,000
What does an index fund try to do?
- A. Beat the market by picking winners
- B. Match the return of a market index
- C. Avoid any losses
- D. Hold only one industry
Two funds track the same index. One charges 0.03% and the other 0.75%. Which is usually the better pick?
- A. The 0.75% fund, because it costs more
- B. Either, fees don't matter
- C. The 0.03% fund
Your turn
Log in to your 401(k) or IRA and write down the expense ratio of every fund you own. If any charge more than 0.5%, find an index fund in the same account that tracks a similar market and compare its fee.
Answer key
What is an index fund, and why do fees matter so much?
Work it out
- Total put in (either fund)$118,000
- Return after a 0.05% fee6.95%
- Return after a 1% fee6%
- Balance after 30 years at 6.95%$442,364
- Balance after 30 years at 6%− $361,580
- Cost of the higher fee= $80,784
- Fees come off the return: 7% − 0.05% = 6.95%, and 7% − 1% = 6%.
- Either way she puts in $10,000 + ($300 × 360) = $118,000.
- At 6.95% she ends with about $442,364, and at 6% about $361,580. The 1% fee costs $442,364 − $361,580 = $80,784.
Check yourself
- B. $100 $20,000 × 0.5% = $20,000 × 0.005 = $100.
- B. Match the return of a market index An index fund buys what is in an index and tries to match its return, minus a small fee. It can still lose money.
- C. The 0.03% fund They hold nearly the same investments, so the lower fee leaves more of the return with you.