Sir John Templeton’s Rule No. 11: Learn from your mistakes
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The only way to avoid mistakes is not to invest—which is the biggest mistake of all. So forgive yourself for your errors. Don’t become discouraged, and certainly don’t try to recoup your losses by taking bigger risks. Instead, turn each mistake into a learning experience. Determine exactly what went wrong and how you can avoid the same mistake in the future. The investor who says, “This time is different,” when in fact it’s virtually a repeat of an earlier situation, has uttered among the four most costly words in the annals of investing. The big difference between those who are successful and those who are not is that successful people learn from their mistakes and the mistakes of others.
