Re: his silence - Isn't he a presidential hopeful (at least in his own mind)? If he's considering a run, perhaps he's trying to appear clean. [edit: clarity]
*was a presidential hopeful is likely more accurate. This breaking caught our attention but the FTC probing, UK parliament etc raising awareness will dent mainstream.
I'm not sure there's any real way to tie this to nefarious intent or insider trading. The timing is so coincidental, however, that it's understandably fueling speculation.
Stock Schedule mention: https://www.cnbc.com/2018/03/20/zuckerbergs-facebook-stock-s...