Analysts dissect Facebook’s IPO prospectus

SAN FRANCISCO - As Facebook hurtles toward one of the largest initial public offerings in US history, its honeymoon with investors may already be over. Facebook’s IPO prospectus, filed with US regulators on Wednesday, revealed a profitable and fast-growing business built upon advertising revenue and online transactions.But the firm’s $3.7 billion in revenue last year was at the low end of analysts’ expectations.