(8)The market in which undertakings operate has been enlarged to embrace the whole Community and this enlargement involves a corresponding increase in their financial requirements and extension of the capital markets on which they must call to satisfy them; admission to official listing on stock exchanges of Member States of securities issued by undertakings constitutes an important means of access to these capital markets; furthermore exchange restrictions on the purchase of securities traded on the stock exchanges of another Member State have been eliminated as part of the liberalisation of capital movements.