Why Psychology Matters in Investing

This lesson explains why psychology matters in investing by showing how emotions, attention, and mental shortcuts shape real decisions. Investors do not act like spreadsheets: they react to uncertainty, recent gains and losses, headlines, social pressure, and their own beliefs about control and risk.

By the end of the lesson, learners will understand the main reasons disciplined investors must account for behavior, not just analysis. They will see how psychological mistakes can lead to poor timing, excessive trading, under-diversification, and abandoning sound plans during stress.