From a technology stand point this is intriguing. But that much said, I am anti-capitalist. The one downside to HF radio is that the available bandwidth is tiny. You'd have to create a compression algorith capable of compressing enough data to complete a trade. Also HF is very susceptible to changing atmospheric conditions. I am a licensed ham radio operator.

1800 symbols per second is the benchmark for shortwave data transmission.

https://en.m.wikipedia.org/wiki/PACTOR

Not sure exactly how useful that would be, but the latency is low: 0.01 seconds to cross the width of the USA.

A round trip packet from NY to SF takes 0.05 seconds, a fifth of the speed. Fibre is quick, but not as quick as radio.

There’s about 1400 bytes usable in a TCP packet, versus the 1800 symbols per second over shortwave. Lots of TCP packets can be exchanged per second.

I don’t see the value proposition.

Maybe they should just slow TF down and trade like us normal peons

Pfffttt, they aren't thinking grand enough. Maybe if the use UHF they could then trade at a UHF frequency of trading.