[rchaud]

Financial auditors cannot sign off on a valuation, they can only say that the financial results as shown present an accurate picture of the company at the time of review. There will be a section for management to comment on specific line items, usually to give context for things like large one-off expenses, or other things that jump out from the numbers.

Valuation depends on estimates of the firm's future revenue growth, predictions about the business climate, etc. That's what investment analysts do, using the audited financial statements as a basis for developing scenarios for the future.