HFT is limited by time on how much processing it can do. In theory, a super-fast dLLM would enable to incorporate information sources in their decision-making that were previously too high-level. E.g., imagine using wire reports to predict an arbitrage opportunity that doesn't even exist yet (I dunno, not an HFT guy).

In practice, iiuc, HFT still happens within 10s of milliseconds, and I doubt even current dLLM is THAT fast.