NEW YORK, March 4 : Uncertainty about artificial intelligence's disruption of business models will complicate lenders' decisions over how much risk to take on in the next two years, a senior Goldman Sachs executive said. Those fears have spread across the financial system, from equity markets into credit markets and the capital-raising process for companies in that sector. Software stocks have been selling off for months, along with shares of asset managers who have bought and lent to them.