Creating a portfolio on Yahoo! UK Finance is fast, easy, and free. You can create and maintain as many portfolios as you like with a single Yahoo! ID. If you don't yet have a Yahoo! ID, you need to register for one before you can create a portfolio (registration is free and also allows you to take advantage of the many other products and services on the Yahoo! network including email, chat, games, and more).
To create a new portfolio, simply log in (or sign up for a Yahoo! ID if you don't already have one) and click the "My Portfolios" tab at the top of most Yahoo! Finance pages. Then click the "Create Portfolio" link. You are presented with the different portfolio options. Simply click the link for the type of portfolio that best suits your needs and follow the steps to create your portfolio.