::
“For the multiple-choice or item-set questions, your score is
determined solely by how your marks are read by the scanning
equipment. Marks made by a writing instrument other than a No. 2 or HB,
or marks that do not completely fill the oval may not be read by the
scanning equipment. For the essay portion of the exam, it is strongly
recommended that you use a No. 2 or HB pencil or a blue or black ink
pen. “
https://www.cfainstitute.org/en/about/governance/policies/cfa-answer-sheet-and-exam-book-policy