Index Ventures is expanding its investment team in New York City, aiming to add three or four new members within the next year.The firm sees potential in the New York ecosystem due to its density of customers, particularly in the health and financial sectors.New York is also a strategic location for firms with portfolio companies or colleagues in both San Francisco and Europe.Index Ventures has already had success in New York, with early investments in companies like Datadog and Cockroach Labs.