We studied that in case of a closed economy, the saving-investment equality holds true. Explain why in case of an open economy the saving investment identity does not hold true? In an open economy, if...

We studied that in case of a closed economy, the saving-investment equality holds true. Explain why in case of an open economy the saving investment identity does not hold true? In an open economy, if savings is greater than investments, what will happen to the foreign capital movement and the current account balance of its economy? If the savings were less than investments, is it possible to increase the investments without affecting to the current account of balance of payment?