The Ballast Online ran an article when Trump tweeted about Boeing and the potential legal implications of such a tweet from the President Elect.

Over 800 shares were dumped minutes before Trump tweeted about Lockheed Martin

It appears that the thing we predicted may have happened. Someone dumped over 800 shares of Lockheed Martin stock minutes before Trump Tweeted about the cost of the F35 program.
It could very easily be a coincidence. The trade could easily have come from someone entirely unrelated to the administration. There are also options, subcontracting firms, and a slew of other securities with their value tied to Lockheed.

This is exactly the problem we pointed out after the Boeing incident. Even if the law was not broken, the appearance is there.