In February 2016, Robinhood introduced instant deposits, crediting users instantly for deposits up to $1,000; previously, funds took three days to appear via ACH transfer.[30] In September 2016 they launched Robinhood Gold, a premium subscription plan that offers up to $50,000 in instant deposits, margin trading, and more market analytics.[31] As of February 2017, the company had executed over $30 billion in trades.[7] In August 2017, the company began offering free stocks in exchange for referring new users.[32] Robinhood has prohibited its users from purchasing some high-risk penny stocks, such as banning purchases of Helios and Matheson Analytics, the owner of MoviePass, in August 2018.[33] Services not offered include retirement accounts, mutual funds and bonds.[34][35]