In a seminar I attended last week, there was a short discussion on why GPUs could not be used for real time analytical apps in HFT. I was under the impression that there were commercial apps in offline risk management and pricing applications. As many know, the big limitation for now is the latency of the CPU<–>GPU link. Is there in fact existing software/hardware workarounds for this problem on the drawing board even if years away? Moreover, is anyone aware of existing apps they could reference? Not knowing much about FPGAs, why have they been incorporated into HF work with similar barriers (or so I have heard) and supposedly GPUs can not?