You need to remember that any changes in stock value do not affect the company, AMD has not lost any money over this. This is only a hit to their reputation, though even then it is more of a hit to those who overvalued the stock previously.
At worst some AMD employees are disheartened that the stock market does not value their company highly, but this changes nothing.
AMD's obligation to their stockholders is to do their best to make a profit so that they can be paid for their contribution to the company. Even as stock values change, the money that the original stocks sold for does not change, so this hit in no way harms AMD.
Right now, AMD is performing as expected. The stock market has simply fallen for their own hype train after the recent increases in AMD's value. We need only remember Nvidia's 10% drop in value for similar reasons back in January.
https://www.overclock3d.net/news/mi...overnight_as_analysts_re-access_the_company/1
Much like consumers, stock markets can easily fall for hype trains, be it for Nvidia thinking that there will be higher sales for GPU for AI etc or for AMD when they no doubt expected a better forecast for Q2.