A strategy of buying ‘the fastest-growing businesses in America’ has paid off for this investor in 2020 By: MarketWatch April 30, 2020 at 12:31 PM EDT Gerald Sparrow screens companies for ‘pure units’ of sales to pick winners. Read More >> Related Stocks: Acceleron Pharma Alteryx Inc Carvana Company Cl A Coupa Software Inc Netflix Okta Inc Cl A Ringcentral Inc Russell Midcap Growth Ishares ETF Shopify Inc Tandem Diabetes Care Trade Desk Inc