we will ask top market strategist joe duran what concerns him the most later in the program. >>> it'salmost here, the initial public stock offering for twitter. the most highly anticipated ipo of the year and a micro blogging service will price the shares tonight ahead of tomorrow's debut. estimates now call for a share price as high as $7 a piece, above the range of 23 to $25 and that was already raised from earlier estimates just days ago. twitter, which has yet to turn a profit currently makes money from advertisements but anxious investors are asking how will the service raise more revenue in the future and what is next in twitter's pipeline? julia boorstin takes a look. >> reporter: the fact that twitter's core business add is potential to sale stuff not when shoppers shop later but in the moment on twitter. they hired nathan hub bard as the first ever heard of commerce. twitter could use information about users's location and interest to offer products ordeals. the big leap will come whenç twitter allows users to link a credit card to their account for one click purchases withi