The stock selection with relatively concentrated equity focuses on the growth of listed companies. The growth of listed companies can be shown as the industry in which listed companies are located has good development prospects, belonging to the sunrise industry, and the profit rate of the industry is much higher than the average level of other industries. The industry enjoys fiscal and tax incentives or is tilted by national policies in other aspects. It can also be manifested in the prominent market position of listed companies' main business, or the fundamental changes of enterprises due to asset reorganization such as mergers and acquisitions, and the substantial improvement of enterprise operating conditions, thus realizing the rapid growth of listed companies. Growth investment funds with relatively concentrated holdings have diversified risks and portfolio investment, while maintaining a high proportion of positions in some key stocks. Polarization of income fluctuation Theoretically speaking, growth investment funds not only get higher income, but also bear higher risks. Generally speaking, with the rise and fall of the market, the income of growth investment funds fluctuates greatly. From the change of unit net value, the net value of some growth investment funds which have been established for a short time has changed greatly, but those growth investment funds with "excellent old brands" can achieve rapid growth in net value in strength and show strong resilience in weakness.