Raymond Ortiz, CFA, provides investment advice to high-net-worth investors. Ortiz has just completed an analysis of Continental Wheat, a manufacturer of wheat-based food products. He rated the company a long-term hold for investors seeking growth and income. Ortiz's analysis included a review of the company's management team, financial data, pro forma financial positions, dividends and dividend policy, and a comparison of Continental with its competitors. Although he does not tell anyone, five years ago, Ortiz worked for and managed the commodities derivatives trading unit of Continental. As part of his compensation at Continental, he received stock, which he still owns. Based upon his research, Ortiz recommends Continental to clients who have a moderate risk tolerance. Two weeks later Continental announces its quarterly earnings are 30% less than a year ago. Consequently, shares of Continental drop by 50%. Ortiz most likely violated the CFA Institute Code of Ethics and Standards of Professional Conduct related to his stock:

A.research.

B.ownership.

C.recommendation.