One of the famed Warren Buffett concepts is the 'circle of competence'. Invest in what you understand, in other words. What you understand should not be a static circle, but all the same it's better to stick to what you know.
That transfers over to the Marketplace, where our authors have built investing services to help readers go further in their investing and take their strategies to the next level. These services are built on the authors' individual investment strategies which are rooted in their circle of competence. Readers can choose from over 160 services,