Oracle is to invest nearly $1bn to gain control of I-Flex Solutions, the Mumbai-based manufacturer of the world's best-selling software for banks, in the largest cross-border takeover of an Indian technology company. Oracle will acquire Citigroup's 41 per cent stake in I-Flex for $593m and invest $316m in a mandatory open offer to gain up to 20 per cent more of the equity of the company, which was set up by the US bank nearly two decades ago. The transaction is the latest in a trend that has seen global technology companies, such as IBM, or US private equity funds...