Quote from bwolinsky:
True, but with massive amounts of capital, it is possible, and I do know how to do it. It's dependent on the price of the currency, and the forward rates available. If the domestic rate is greater than forward rate discounted at the foreign interest rate, then borrow foreign, lend domestic. Opposite if the domestic rate is less.
Quote me 30,90,120,180, 270, 360 day FRA's and the current spot and forward price of EURUSD, GBPUSD, JPYUSD, rather USDJPY, and yen and yuan per USD. There's tens of combinations, but there might be one in there.
Either way, just having the data is enough if you can automate this process. In fact I'd give anything to hire a programmer with access to that data to automate covered interest rate parity. It wouldn't be hard. You program all the possible combinations one time and the only variable that changes is the prices. I wish I had software available with that information on it, but it requires some development.