HFT trading is very big.
Maybe not in terms of earnings, but in volume. Estimates range from 30-70%, depending on the market.
I'm digging up references now for an edit...
Maybe not in terms of earnings, but in volume. Estimates range from 30-70%, depending on the market.
I'm digging up references now for an edit...
Here's a thought experiment: how much would things change if HFT firms traded half as much, with double the margin on each trade? Some securities would be a bit less liquid but otherwise almost nothing would change. It certainly wouldn't be a 2x difference from the status quo!
Furthermore - HFT is perhaps the worst case for Julia, since the implementation will always be in low level languages. Julia's speedup is only useful for research in HFT.