Which one of the following is NOT a duty of the investment professional according to the CFA Institute's Code of Ethics?

The duty of ensuring that clients are always informed of market changes is not explicitly outlined in the CFA Institute's Code of Ethics. While staying informed is important for investment professionals, the specific obligation to keep clients continuously updated on market changes is not a defined duty within the framework.

Conversely, acting in the best interests of clients, promoting ethical behavior within the industry, and continuously improving one’s financial knowledge are core responsibilities expected of investment professionals. These duties emphasize the commitment to client advocacy, integrity within the profession, and ongoing professional development, which are essential to maintaining trust and competence in client relationships. The focus on ethical conduct and knowledge enhancement reflects the overarching goals of the CFA Institute's Code of Ethics, aiming to uphold the standards of professionalism in the investment community.