Two channels of foreign investment: Foreign Direct Investment (FDI) is a lasting investment with management control in an enterprise, while Foreign Institutional Investment (FII, now broadly FPI) is short-term portfolio investment in financial securities.
The FDI-versus-FII distinction (control versus portfolio, stable versus hot money) is a recurring external-sector economy item.
FDI (lasting control, an enterprise) versus FII/FPI (short-term securities, no control); "patient capital" versus "hot money".
FDI is lasting investment with control; FII/FPI is short-term, volatile portfolio capital ("hot money").