BlackRock Inc., the world’s largest asset manager, is in talks with billionaire Mukesh Ambani’s Jio Financial Services Ltd. to set up a private credit venture, aiming to tap the expanding direct lending opportunities in India, according to people familiar with the matter. The 50-50 joint venture will lend to businesses ranging from large companies to startups, the people said, asking not to be identified as the information is not public. If the companies decide to proceed, it will be the New York-based firm’s third venture with the firm controlled by the richest Asian after they joined forces to start asset management and stock broking businesses in the country.