SBI has a board-approved policy to support the fintech sector. : Country's largest lender SBI, which has not been able to invest in fintech startups despite earmarking funds, is now looking to modify rules to kickstart the infusion, a top official has said. "We are a public institution and investments in startups are generally considered very risky. We understand that traditional way of investing will not work," chairman Rajnish Kumar told PTI on the sidelines of an event here over the weekend.