Calm down. It's the replacement of a few mid-level executives.
And PTR has already said that this will not effect its operations.
It's an overblown tempest in a teapot.
I,m not saying that PTR will not go down, but it will go down (or up) with its sector due to the market, basically.. Any effect of the graft investigation will be temporary. This is NOT a "very dangerous" situation.