CPIS, or Cross-Border Portfolio Investment Survey, is a comprehensive measure of the flow and stock of investments made by individuals and institutions across international borders. It provides valuable insights into the global financial landscape, tracking the movement of funds between countries and shedding light on the interconnectedness of economies. This data is crucial for policymakers, investors, and researchers in understanding the trends and risks in international investments. CPIS is conducted by the International Monetary Fund and is considered a key source of information for monitoring and analyzing global capital flows.