Warren Buffett once blasted diversification for professional investors — here's why he might be wrong

Group 1 - The article emphasizes the importance of diversification in investment strategies, particularly for average investors who may lack the time for in-depth analysis [2][3][5] - Warren Buffett advocates for a well-diversified passive index fund approach, citing the Vanguard S&P 500 ETFs which have achieved a 14% compounded annual growth rate since 2010 [2] - Despite Buffett's own concentrated investment strategy, where 50.19% of his portfolio is in Apple, he still recommends diversification for ordinary investors [11][13] Group 2 - Moby's research has outperformed the S&P 500 by nearly 12% on average over four years across almost 400 stock picks, indicating the effectiveness of their investment recommendations [6] - Investment platforms like Robinhood and Acorns provide tools for easy diversification, allowing users to trade stocks without commissions and automate their investments [7][9] - Commercial real estate and fine art are highlighted as alternative investment options for diversification, with platforms like First National Realty Partners and Masterworks making these assets accessible to a broader range of investors [15][21]