Chemicals giant DuPont ( DD) met Wall Street's fourth-quarter earnings estimates and reaffirmed its guidance for 2007. DuPont said Tuesday that excluding items, it earned 45 cents a share in the quarter, matching the Thomson Financial consensus forecast. Sales rose 8% from a year ago to $6.3 billion. After accounting for all items, the company earned $871 million, or 94 cents a share, for the fourth quarter, up from $154 million and 16 cents a share last year. For this year, DuPont expects a profit of about $3.15 a share. On average, analysts are looking for $3.22. The company had earnings before items of $2.88 in 2006.