There are quite a few foreign hedge funds that hire hackers to breach companies and steal data.

Trades are back-fitted into some model for plausible deniability, and they also purchase political and legal cover, often at the highest levels. I wouldn't surprised some are just a front for an APT that needs more cash for their black budgets.

They generate a lot of asymmetry, billions upon billions.

Here's some patsies that got caught: https://www.theverge.com/2018/8/22/17716622/sec-business-wir...