The share prices of many fundamentally strong growth companies have recently declined with the market turbulence -- among them were Shopify (NYSE: SHOP), Nvidia (NASDAQ: NVDA), and Square (NYSE: SQ). NVDA Revenue (TTM) data by YCharts Nvidia's dominance in the booming GPU market is reflected in its financials. The U.S. equity market entered a turbulent zone in September, with volatility driven by worries about inflation and the impact that sharply rising COVID-19 cases could have on the economy.