When it comes to business and relationships, I don't buy this idea of diversification. It neglects comparative advantage. The best way to lower risk is to specialize: Put the things you love into one portfolio.
Zhang Xin, co-founder and CEO, Soho China, "'The Best Advice I Ever Got'," Fortune, May 12, 2008
(Zhang, a woman, is one of Beijing's most successful property developers and a product of Western training - Cambridge, Goldman Sachs. Her husband, Pay Shiyi, focuses on sales while she handles construction.)