In the past few years, we have seen cyber criminals deploy a handful of sophisticated insider trading/market manipulation schemes. With huge potential "rewards", these are likely expected to increase in frequency, severity and in intelligence. They In an OpEd for Harvard Corporate Governance we summarize the current state of such breaches, discuss some additional challenges they pose (including residual damage) and explore possible avenues that the hackers may attempt to exploit next: https://www.gbainsurance.com/sites/default/files/2017-05/Insider%20Trading%20OpEd%20Harvard%20CorpGov.pdf