Core Insights - Volatility is an inherent aspect of investing that cannot be completely avoided, but investors can control their reactions to it [1] Group 1: Common Investment Mistakes - Obsessing over intraday price movements is a frequent mistake, especially among retirees who may have more time to monitor their investments [3] - Not investing in ETFs can limit diversification; ETFs allow investors to spread their money and reduce risk associated with individual stocks [4][5] - Overallocating funds to cash accounts can lead to losses in purchasing power due to inflation; it is advised to consider alternatives like Treasuries or high-quality fixed income [5][6] - Failing to have an exit plan is a critical oversight; knowing when to exit an investment is as important as knowing when to enter [7]