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THE SCENARIO
For the past 5 years, I've been paying an extra $10 per month to increase the speed of my internet connection at home from 15 MB/s to 50 MB/s. During those years, the S&P 500 index has
increased in value an average* of 11.69% per year.
The question: If I'd invested that extra $10 per month into the S&P 500** for the last 5 years instead of paying for higher internet speed, how much would my account be worth today?
* There are different ways to determine averages, but since returns compound on each other, I used a multiplication-followed-by-root method to determine the average rather than just ad...
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