It looks fun, but as I'm doing financial modelling right now, Julia may be a better fit for me, as it has very nice libraries as well.

You may want to check APL family as a possible option for prototyping at least.

APL itself looks really really bad language with bad documentation, no real libraries, non-existent type system, bad function names, and I don't see any GPU programming support in it. In the family Matlab is still the best (It can do Monte Carlo simulation on the GPU, and has a great library for different distributions), but it's still much slower language than Julia generally.