(9)Financial innovation has led to the creation of new types of financial instruments that give investors economic exposure to companies, the disclosure of which has not been provided for in Directive 2004/109/EC. Those instruments could be used to secretly acquire stocks in companies, which could result in market abuse and give a false and misleading picture of economic ownership of publicly listed companies. In order to ensure that issuers and investors have full knowledge of the structure of corporate ownership, the definition of financial instruments in that Directive should cover all instruments with similar economic effect to holding shares and entitlements to acquire shares.