Dell Inc. stock surged after Bloomberg News said the personal computer maker was in early talks with at least two private equity firms about going private. A buyout would be worth more than $17 billion, based on total enterprise value. Dell has some $9 billion in debt, but $11 billion in cash. A deal would make it the largest technology buyout since the $17.6 billion acquisition of Freescale Semiconductor by a group of buyers led by the Blackstone Group in 2006.