5. Securities, including debentures and treasury bonds, as well as their derivative instruments issued by the State, by the Municipalities or by other Bulgarian legal persons, with a remaining term until maturity not shorter than 6 months.
6. Loans, also in forms of financial leasing, for a term not shorter than 12 months.
7. Intellectual property rights – articles of copyright and neighboring rights, patented inventions, utility models, trade/service marks and industrial designs.
8. Rights stemming from concession contracts and contracts for the assigning of management.
Bilateral treaties, to which Bulgaria partly provides promotion and mutual protection of foreign investments and a wide definition of the rules governing the regarding fields.
