Overestimating Select Manufacturing, Service and Retail Investments
In his 2015 shareholders letter, Warren Buffett highlighted the depth of Berkshire's manufacturing, service and retail operations, noting that some businesses in the firm's portfolio have poor returns, and he considers those serious mistakes.
"In most of these cases, I was wrong in my evaluation of the economic dynamics of the company or the industry in which it operates, and we are now paying the price for my misjudgments," he wrote. "At other times, I stumbled in evaluating either the fidelity or the ability of incumbent managers or ones I later appointed."
What you can learn from Buffett here is not to jump into investments blindly. If you're not intimately familiar with a company, pass on it or seek advice from a trusted expert.
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