(12)The calculation of short or long positions should take into account any form of economic interest which a natural or legal person has in relation to the issued share capital of a company or to the issued sovereign debt of a Member State or of the Union. In particular, it should take into account such an economic interest obtained directly or indirectly through the use of derivatives such as options, futures, contracts for differences and spread bets relating to shares or sovereign debt, and indices, baskets of securities and exchange traded funds. In the case of positions relating to sovereign debt it should also take into account credit default swaps relating to sovereign debt issuers.