Robinhood debuted its flagship $658.4 million venture fund on the New York Stock Exchange on Friday, offering retail investors ‌a rare chance to invest in high-profile, privately held technology companies. Private company ‌investments have long been the playground of Silicon Valley's biggest venture capital firms, with retail investors largely ​shut out of the booming market where valuations have surged in recent years. The fund, which began trading under the ticker 'RVI', has investments in prominent private companies, including software startup Databricks, fintech Ramp and financial services firm Revolut.