Portfolio Investment is an investment in financial assets such as stocks, bonds, and mutual funds, made by investors who are not seeking to control or manage the company. Foreign Direct Investment (FDI) involves gaining control or significant influence over a foreign enterprise. ADRs and GDRs represent foreign ownership of domestic company shares traded internationally, fitting the definition of portfolio investment. The key feature of Masala Bonds is that the currency risk lies with the investor (the bondholder) and not the issuer (the Indian entity). This protects Indian companies from currency fluctuations when raising foreign capital.