Uncle Sam in action (Brent Crude Oil reacting)

https://www.tradingview.com/chart/Ptv41VXt/

https://twitter.com/marsxrobertson/status/1213085144250290177

Earlier in 2019

https://en.wikipedia.org/wiki/2019_Abqaiq%E2%80%93Khurais_attack

Someone who knew that, could make a lot of money

You can hack earnings announcement, or you can hack the company itself and announce the breach.

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3365024

Retail Insider Trading and Market Price Efficiency: Evidence from Hacked Earnings News.

Sounds like an interesting paper to read...