I trade for myself. Looked to open up a Firm with Terra Nova, but we decided that San Antonio still lacks many important key "Individuals" that would grasp the concept.
Kershner Trading in Austin, Chop shop, still using "Soes" bandit methods. But hey, they just moved to a new shiny building with more Space. So, the chop shop/day trading firms might catch on.
Texas has more "Desk" jobs in the "Trading world" than individual traders. It is a small group in Texas but from the one's I have met, they are pretty sharp.
There are a few Key Funds (hedge and money Mg. teams in the SA/ATX area.
But very little "Locals" , to use the Chicago Terminology.