Anycolour seems obssesed with its stock so a -10% definitely is alarming their bells and it's obviously from Selens fuck up.
Cover is probably a mix of financial report and doki situation, inevitably there are going to be people who realise how dumb it is to invest in vtuber agencies stock which are highly voletile, not to mention both cover and Anycolour are overvalued.
Cover doesn't seem to care about its stock price though, which is a good thing they are very much not doing anything to please the investors, be it their cuts to talent's or investing in other ventures.
Holoearth for eg is a very big investment, might even go as high as their studio. Yagoo is aware that this isn't going to be a global hit, the thing they want to achieve is very ambitious and it will take them several years to make this project come to frutation.
It isn't stopping them from doing it, and from recent interviews it seems like the company is looking at the industry as a whole and understanding what the phonominon is about, yagoo mentioned KR vtubers and is well aware of other western vtubers, they are in it for long term and have big ambitions. Thing's like a dip in stock price is not something they bother with.
Cover wants to be a pioneer in metaverse or virtual content in general, it is wild that they think they can achieve it with what is essentialy women larping as anime women but their formula is working and it's very possible that they can take it to the next level.