Most investors fear making the wrong move. They obsess over buying at the top, selling at the bottom, picking the wrong stock, choosing the wrong fund, or mistiming the market by a matter of weeks. They replay past mistakes like bad trades are moral failures rather than learning experiences. But history suggests something far more damaging than bad decisions. The biggest losses rarely come from what investors do . They come from what investors don’t do . Errors of omission—missed opportunities, delayed action, uninvested capital, avoided risks—are silent wealth destroyers. They don’t show up as red numbers in an account statement. They don’t trigger margin calls. They don’t generate regret immediately. They simply compound quietly in the background. And by the time investors realize what they’ve lost, the cost is irreversible. What Is an Error of Omission? In investing, errors fall into two categories: Errors of commission : Buying the wrong asset, selling too early, chasi...