center, middle, centre, eye, heart - an area that is approximately central within some larger region; "it is in the center of town"; "they ran forward into the heart of the struggle"; "they were in the eye of the storm"

British capital, capital of the United Kingdom, Greater London, London - the capital and largest city of England; located on the Thames in southeastern England; financial and industrial and cultural center

securities industry, market - the securities markets in the aggregate; "the market always frustrates the small investor"