Citigroup's venture arm, Citi Ventures, has put money into nearly 50 companies over the years. Citi CIO Vanessa Colella explains what the bank looks for when investing in a startup. Earlier this year, Citigroup rolled out a partnership with Feedzai — an artificial-intelligence-powered fraud-detection company — to bolster the bank's ability to alerts clients in its Treasury and Trade Solutions business to aberrant or suspicious payments.