Results of third survey

Best career choice for CFA Charterholder is:

CQF - Certificate in Quanitiative Finance

CQF is a specialized certificate for all those who are interested in becoming Quants in Investment Bank. This certificate was launched by Paul Wilmott, who is considered by some as a guru in this field. The company that is organizing the exam and classes (which are integral part of the certification process and you cannot be awarded CQF designation without spending many weekends in the classroom) is 7City, which is also preparing students for CFA and other certificates.
CQF designation is not very popular, but due to the fact that it is very focused it is quite prestigious in the quant environment. It has simply no competition. CFA or CAIA are by far more general and do not cover asset pricing (etc. Ito's Lemma, Interest Rate Models) deep enough to prepare a candidate to very technical field of quantitative finance. If you are thinking about becoming a Quant CQF certificate (or more broadly - a CQF Course of Studying) will prepare you to that role. You need to remember, however, that you need very good prior math preparation in order to catch up with the course of studying.
And should you do CQF if you already have PhD in Finance or in Economics? I think that it will not be very wise choice to do that. PhD is already very useful degree for Quantitative Finance. CQF is expensive (~10k pounds) and it takes time to finish it. On the other hand, if you have PhD in other discipline (like Chemistry, Mathematics) and you never did anything with finance, getting a CQF will probably open a lot of doors in IBanks for you.