What should I review after missing a CFA Ethics question?

Tag the reason you missed it. A useful Ethics error log should say more than "review Ethics."

Use categories like these:

• Wrong actor: you analyzed the supervisor when the question tested the analyst.
• Wrong duty: you treated a fair dealing issue as a suitability issue.
• Disclosure shortcut: you assumed disclosure cured a situation that required consent or abstention.
• Overbroad remedy: you chose the harshest answer even though the Standard required a narrower fix.
• Result bias: you judged the outcome instead of the conduct.

Once you know the error type, review the relevant Standard and redo similar vignettes. That is more efficient than rewriting the whole Ethics reading.