Disclosure of Personal Investment in Research Analysis

As an investment analyst at a prominent asset management firm, Maria is responsible for preparing research on a specific stock her firm has recently started buying. While conducting her research, Maria decides to personally invest in that same stock, believing it will perform well. Before making her investment, she does not disclose her intentions to her firm nor her colleagues. This situation raises questions about compliance with the CFA Institute's Research Objectivity Standards regarding personal investments.

What should Maria have done to adhere to these standards?