Yahoo doesn’t like outgoing links. But if you have no outgoing links on your home page, then Google will not be happy with your site. The trick is to strike some sort of balance to make both yahoo and google happy. Then you need either 1000s of links pointing to your site with the anchor title that you are interested in, or 100+ very high pr pages (pr 5, 6, 7 and 
pointing to your site with the anchor title that you are interested in. Of course, these links need to be added very gradually over time and they must all come from unique ip addresses. Go to yahoo and google, type the same search term and compare how many outgoing links the top 20 results have on each search engine. use this tool xhttp://www.outgoinglinks.info