What action by Johnson in his brochure could be considered a violation of ethical standards?

The action that could be considered a violation of ethical standards is implying superior performance due to the forthcoming CFA Charter. This is because claims or implications regarding future credentials or designations may mislead clients or others about one's current qualifications and capabilities. Ethics in finance emphasize transparency and honesty, meaning that a professional should not suggest that they possess an advantage or superiority based on qualifications that they have not yet earned.

Implying superior performance can create an unjust advantage in the market and erode trust in the profession, which is contrary to the values upheld by the CFA Institute. It is vital for professionals to communicate their current status accurately and responsibly without overrepresenting their qualifications or capabilities.

The other actions, while they may raise eyebrows depending on how they are interpreted, do not directly imply an unethical advantage based on future possibilities. For instance, stating one has passed all three levels of the CFA exam is factual if true and does not imply anything beyond the completion of the testing process.