My company paid an extremely high price for the acquisition of another company; the price was recommended by the valuation of an investment bank. We now have financial crisis. Is there any way to make that bank legally responsible for this situation?
I would say no. The investment bank does a valuation according to the expected value of the flows the company could make and its risk. What an investment bank gives is a valuation and not a "price of valuation." The responsibility for the price lies with the company that realizes the offer.