What is the fine-grained topic of the following text: Investing its funds in securities (shares) - a rather profitable kind of investment best to invest in, however, is fraught with many element, because the market is constantly changing, and in order to keep up with him, to notice certain trends, you need to have special knowledge and skills, education, eventually appropriately. Only return the topic.
The fine-grained topic of the text is "Investing in Securities and the Required Knowledge for Successful Investment."