[Vespasian]

Are they under any obligation to ground the value of their own stock or can a salesman simply claim that the "true" value of that stock is much much more than it currently seems to be?

[Anonbrit]

Stock is worth exactly what people will pay for it. Ebay share holders get to vote to accept or reject this deal

[croemer]

Presumably stock market valuation is grounding?

Also, eBay shareholders can vote down the acquisition if they don't think the deal is good for them.