Welcome to the Bogleheads' October Project, Chapter 19, "Mastering Your
Investments Means Mastering Your Emotions."
Let's start with a little quiz:
1. A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost?
2. If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?
3. In a lake, there is a patch of lilypads. Everyday, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?
We'll come back to the answers at the end, but trust me, this relates to the my review of Chapter 19 of the Bogleheads' Guide to Investing.
When it comes to investing, we are all better off to be like Mr. Spock, above. Emotions, at times, serve us very well. The fight or flight reaction pumps up our adrenaline and helps us either in battle, or to get the heck out of a bad situation. However, knowing which to do when is often when our emotions get the better of us. Things like ego and overconfidence could be big trouble.
We are all emotional beings. This we know. We get excited, fearful, optimistic, depressed. These emotions have a greater impact on our decision making than most of us would like to believe. In the end, almost all of us, in almost everything we do make one massive error that, if applied to investing, could cost you dearly. What is this error?
We make decisions emotionally and justify them rationally.
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