Principle 9 of 11
Stay Consistent: Why Regular Investing Beats Perfect Timing
Regular investing beats perfect timing. Same amount, every month, for years.
Stay Consistent in one sentence
Staying consistent means investing the same amount on a regular schedule — like every month — no matter what the market is doing.
Lots of people try to invest at the "perfect" moment — right before prices go up. The problem is that nobody knows when that moment is, not even professionals. Consistent investing skips the guessing game entirely.
Example: $30 a month for three months
Imagine you invest $30 every month into a (made-up) fund, no matter what. The price per share bounces around:
| Month | Price per share | You invest | Shares you get |
|---|---|---|---|
| Month 1 | $10 | $30 | 3 |
| Month 2 | $6 | $30 | 5 |
| Month 3 | $15 | $30 | 2 |
| Total | — | $90 | 10 |
Your average cost: $90 ÷ 10 shares = $9.00 per share
The average price over those months: ($10 + $6 + $15) ÷ 3 ≈ $10.33
Because the same $30 buys more shares when the price is low and fewer when it is high, your average cost ended up lower than the average price. This approach has a name: dollar-cost averaging. When the price dropped in month 2, it was actually a chance to buy more.
Why it matters
Consistency turns investing into a routine, like brushing your teeth. You don't need to watch the news or guess what will happen next. You just keep going.
It also adds up. $25 a month is $300 a year. Over five years, that is $1,500 put to work — and with compound growth on top, the total can grow to be more than what you put in, though it is never guaranteed.
Consistency is also a great defense against the emotional mistakes in Principle 7. If your plan is "same amount, every month," there is nothing to panic about and nothing to chase.
Common mistake: stopping when prices drop
When prices fall, it feels natural to pause and "wait until things look better." But look back at the example: the month with the lowest price was the month your $30 bought the most shares. People who stop investing during dips miss the cheapest buying they will get.
Check yourself
1. You invest $20 when the price is $5 and $20 when the price is $4. How many shares do you own?
Show answer
9 shares. $20 ÷ $5 = 4 shares, and $20 ÷ $4 = 5 shares, so 4 + 5 = 9.
2. If you invest $15 every month for 2 years, how much have you put in?
Show answer
$360, because 2 years is 24 months and 24 × $15 = $360.
3. What is dollar-cost averaging?
Show answer
Investing the same amount on a regular schedule, so you automatically buy more shares when prices are low and fewer when they are high.
Try it: Compound Machine
Compound Machine is a Daily Challenge game where you drag a slider from 1 to 40 years and watch a starting amount grow. Compound Machine shows what a single amount can grow into over time — now imagine adding to it every single month.
Learn one of these every morning
Market Juice is a free daily digest for kids ages 10–16: real market news, three quick games, and a lesson that ties back to these principles — about 3 minutes a day.