Apple's Hedge Fund Trading; Does MSFT do the same to increase its cash balance?

http://www.zerohedge.com/news/2013-01-27/600-billion-trades-four-years-how-apple-puts-even-most-aggressive-hedge-funds-shame Money Quote: "Finally, there is the minor question of who exactly is it that executes these trades, or, in other words, which are the banks that have pocketed billions in commissions on AAPL's furiously traded portfolio? We don't know, but we wonder: could it be the same banks that come rain or shine, gave AAPL a Buy rating, one which is still held by some 52 of the 63 banks covering the company, among which naturally are the most prominent brokers of "investment grade" securities" MSFT added $5Bn to its cash balance this quarter. Any evidence of whether MSFT's cash hoard is also primarily outside US and is it coming only from sale of goods or even such type of investing?