During a Berkshire Hathaway shareholder meeting a few years ago, Warren Buffett and Charlie Munger were asked a straightforward yet revealing question: If someone in your local town owned three to five businesses, such as a cake shop and a dry cleaner, you’d probably think they were pretty well diversified. So why do financial experts often recommend holding 20 to 30 stocks in a portfolio? The questioner was curious about Buffett’s views on diversification and how he approaches concentrating his investments. Don’t Miss: Amid the ongoing EV revolution, previously overlooked low-income communiti…