theodp writes: 'There's a funny thing about the estimated $1.7 trillion that American companies say they have indefinitely invested overseas,' reports the WSJ's Kate Linebaugh (reg. or the old Google trick). 'A lot of it is actually sitting right here at home.' And if tech companies like Google and Microsoft want to keep more than three-quarters of the cash owned by their foreign subsidiaries at U.S. banks, held in U.S. dollars or parked in U.S. government and corporate securities, Linebaugh explains, this money is still overseas in the eyes of the IRS and isn't taxed as long as it doesn't flow back to the U.S. parent company. Helping corporations avoid the need to tap their foreign-held cash are low interest rates at home, which have allowed U.S. companies to borrow cheaply. Oracle, for instance, raised $5 billion last year, paying an interest rate roughly two-thirds of a percentage point above the low post-crash Treasury yield, about 2.5% at the time (by contrast, grad students and parents pay 6.8%-7.9% for Federal student loans). Were the funds it manages to keep in the hands of its foreign subsidiaries brought home and subjected to U.S. income tax, Oracle estimated it could owe Uncle Sam about $6.3 billion.