Apple's $17 billion bond sale -- meant to help finance a $55 billion stock buyback, part of a plan to return $100 billion to shareholders by 2015 -- is saving the company about $9.2 billion in taxes, according to an estimate from Moody's Investment Services. Had Apple decided to use repatriated foreign cash, it would have paid a 35 percent tax rate, and hence owed the US about $9.2 billion.
