<p>I know its incredibly difficult to become one, but what courses are the most valued. PDE’s? QM?</p>
<p>go to wilmott.com as well as the career section of the Art of Problem Solving website. It is covered very well there (especially at AOPS where you have people who are or were in the industry answering)</p>
<p>Differential Equations, Stochastic Calculus, Statistical Calculus etc…</p>