Based on conversations with her husband, Grace is considering selling the $$100,000$ ABC stock and acquiring $$100,000$ of XYZ Company common stock instead. XYZ stock has the same expected return and standard deviation as ABC stock. Her husband comments, $$It doesn$$t matter whether you keep all of the ABC stock or replace it with $$100,000$ of XYZ stock$.$ State whether her husband$$s comment is correct or incorrect. Justify your response.