They do not have that much cash on hand. Apple already has over $100B in common and exotic debt that has been used to pay for both dividends and this buy back

They do not have that much cash on hand. Apple already has over $100B in common and exotic debt that has been used to pay for both dividends and this buy back program. So that pile of cash sitting overseas? On its way to being mostly spent. And if the Congress critters start pressing companies to repatriate, a big tax bill looms too.