In the financial market many stochastic calculations have to be made and large amounts of data has to be compared. Exactly kinds of computations which can be sped up well by OpenCL.
OpenCL has manifest itself already in the sector, because of its good results. Expect to have near-to real-time results (depending on external factors such as databases and network). For portfolio-benchmarking the parallelisation-factor is very high and thus is OpenCL a very useful technique.