  In this work, we introduce Modern Portfolio Theory using basic concepts from
linear algebra, differential calculus, statistics, and optimization. This
theory allows us to measure the return and risk of an investment portfolio,
serving as a basis for decision-making in the financial market. As an
application, we will present four very simple investment strategies that aim to
minimize the risk of investing in only two assets, outperforming the CDI
(Interbank Deposit Certificate) yield.
