Yatırım fonları are collective investment schemes that pool money from multiple investors to invest in a diversified portfolio of assets, such as stocks, bonds, or real estate. This allows individual investors to access a broader range of investment opportunities and benefit from professional management. Investors buy shares in the fund, and the fund manager makes decisions on behalf of the investors. The value of the shares fluctuates based on the performance of the underlying assets. Yatırım fonları are regulated by financial authorities to ensure transparency and protect investors' interests.