[karmakurtisaani]

Yes, for sure useful for the appropriate mathematics. My point is, the trading strategy was a simple heuristic wrapped into overly complicated definitions and proofs. The complicated mathematics added exactly nothing to the application.

[catgary]

I think the point was they (probably) used the abstract math to prove some desirable properties about the trading strategy?

[karmakurtisaani]

Yes, it was something like that. But "desirable" here means something very different for mathematicians and traders actually applying the strategy (I.e., they don't care at all, and neither does anyone else working in finance).