العربيد نضال, and جانم منهل. 2021. “Evaluating The Performance Of The International Investment Portfolio Of A Sample Of US Government Treasury Bonds Using The Return And Risk Model To Rationalize The Investment Decision ((An Analytical Study))”. Tishreen University Journal- Economic and Legal Sciences Series 43 (2). https://journal.tishreen.edu.sy/index.php/econlaw/article/view/10523.