'secret sauce', 'trade secrets'
Not by any ordinary meaning of the terms. Not even 'secrets' by any ordinary meaning of the term: market trading is done in public, in a public market, with the public.
Writing as a person who created trade secrets, and the secret sauce, in the finance industry, I wondered if the miscreants had stolen trade secrets, or secret sauce, and if so, if they could possibly have made any money out of doing so, and if the victim could possibly have lost money from the theft.
Reading the article, I see that the answers are No, and No: if any trade secrets were stolen, it didn't cost the firm anything, and didn't gain the thieves anything.
The theft, the loss, the gain, came from front-running and the artificial delays. So a descriptive headline would have been something like:
Hackers steal millions from major us hedge firm
Hackers intercept trades from ..
Hackers delay trades from ...
Hackers re-route trades from ...
Hackers inside-trade inside ...