FAIR ISAAC CORP. $16 (New York symbol FIC; Aggressive Growth Portfolio, Manufacturing & Industry sector; Shares outstanding: 48.5 million; Market cap: $776 million; Price-to-sales ratio: 1.0; WSSF Rating: Average) provides products and services that help businesses around the world make better decisions on customer creditworthiness. Its main business is its FICO software, which lets creditors use information about a customer to calculate a credit score. In the fiscal year ended September 30, 2008, Fair Isaac’s revenue fell 5.0%, to $744.8 million from $784.2 million. Sales growth has slowed along with increasing problems in credit markets. Earnings per share fell by 15.5%, to $1.64 from $1.94. Fair Isaac now aims to expand the use of its FICO score in the face of growing competition; new deals with banks and credit unions will allow them to give free FICO scores to their customers. Helping borrowers improve their credit scores should also lead to fewer loan losses for Fair Isaac’s clients. Earnings in fiscal 2009 will likely fall to $1.55 a share, which gives Fair Isaac a p/e ratio of 10.3. That’s reasonable when you consider that, over the longer term, the subprime crisis will likely increase demand for its reliable credit-scoring software. The $0.08 dividend yields 0.5%. Fair Isaac is a buy.