Yelp’s IPO filing: no tricks, but big questions linger

Yelp’s S-1 for its upcoming IPO is a breath of fresh air. After five months of studying the S-1 of daily deals site Groupon, I’m glad to see local-business-reviews site Yelp come out with a reasonably clean document.Groupon tortured many accounting rules and made up some of its own (forcing it to amend its S-1 repeatedly and delaying its IPO), but Yelp seems to be playing by the books.

Warren Buffett has taken an $11 billion stake in IBM

Billionaire Warren Buffett’s Berkshire Hathaway now has a stake in IBM worth $11 billion, making it the largest single stakeholder in the company.  With fully 5.5 percent of the all common shares, Buffett, who is the president, chairman and chief executive officer of conglomerate Berkshire Hathaway, has been snapping up as much IBM as he can over the past eight months.