Which exam should I take: Series 65 vs. Series 66?
Candidates that have met or will meet the co-requisite of the Series 66 exam, would elect to take the Series 66 instead of the Series 65 exam due to its brevity, scope and relative level of difficulty. Candidates for the Series 66 exam must also pass the Series 7 exam. Those candidates that are not eligible to sit for the Series 66 exam can sit for the more lengthy and onerous Series 65 exam which carries no prerequisite or co-requisite.