Shares of diagnostic test maker Hologic Inc. jumped Monday with the broader market after an analyst said the company's developing three-dimensional medical imaging technology could be the highlight of an upcoming medical conference.

Shares of U.S. Steel Corp. slid Tuesday as a UBS Investment Research analyst slashed an estimate of the steel maker's 2009 earnings, citing an expected first-quarter loss amid mill outages.

Shares of Citigroup Inc. climbed in premarket trading Friday, as the financial giant was said to be looking at selling off pieces of itself -- or the entire company -- to help rebuild investor confidence.

The prospect of a government bailout for automakers could rally shares, an analyst said Sunday. NEW YORK -- Consumers are likely to search out deals for home decor at places with better value messages than Williams-Sonoma Inc. this holiday season and beyond, leading to a difficult fourth-quarter and 2009 for the home-decor retailer, an analyst predicted Monday.

Pressure intensified on Citigroup to sell part or all of itself as its stock fell below $4 a share on Friday and fears escalated about future loan losses.