Updated from 10:36 a.m. ESTTwo insurers painted very different pictures of the fourth quarter Thursday with American International Group ( AIG) posting a 3.8% gain in profits due to rising premiums while Chubb Corp. ( CB) said earnings fell 83% amid large charges related to Enron ( ENRNQ). Still, analysts said the outlook for both companies, and indeed the industry, looks bright. AIG posted fourth-quarter net income of $1.87 billion, or 70 cents a share, up from $1.80 billion, or 68 cents a share in the same quarter last year. The firm's "core income," which included a 3-cent charge related to Enron surety losses and a provision for Northridge earthquake claims, rose to 75 cents per share, compared with 68 cents a share last year. Still, analysts had called for a 78-cent profit, sending the stock down 1% to $69.97 Thursday. Revenues at the company rose 8.3% to $16.69 billion in the fourth quarter as AIG's worldwide general insurance net premiums written grew 15.4% to $5.20 billion.