By definition, foreign saving is eq

By definition, foreign saving is equal to the
difference between investment and domestic
saving. In a closed economy, if ex ante
investment rises but ex ante saving does not,
interest rates will rise; that is the principal
result of the IS/LM model. However, in an
open economy, an ex ante rise in investment
might not be accompanied by an increase in
domestic saving; instead, the gap could be
filled by foreign saving.

Hasil (Bahasa Indonesia) 2:

Menurut definisi, tabungan asing sama dengan
perbedaan antara investasi dan domestik
tabungan. Dalam perekonomian tertutup, jika ex ante
naik investasi tetapi ex tabungan ante tidak,
suku bunga akan naik; yang pokok
hasil dari model IS / LM. Namun, dalam
perekonomian terbuka, kenaikan ex ante investasi
mungkin tidak disertai dengan peningkatan
tabungan domestik; sebaliknya, kesenjangan bisa
diisi oleh tabungan asing.