What happened?According to data from S&P Global Market Intelligence, shares of EHang Holdings (NASDAQ;EH) rose 11.4% Monday. The company's presentation at the Mobile World Congress in Barcelona, Spain (MWC), saw the electric flying taxi gain ground.Monday's trading saw a strong showing for technology stocks that are growth-dependent. EHang also benefited from positive market momentum as the tech-heavy Nasdaq Composite index ended the day up 0.9%.What are you waiting for?Andreas Perotti was the chief marketing officer for Europe at the company and presented the EHang216, an electric-powered autonomous flying taxi. June saw investors return to growth-oriented technology stocks in addition to the MWC Exhibition. Although it is not clear which factor was more important in Monday's stock gains, the market's general appetite for risky growth plays could have an impact on the company’s share price in near future.What now?EHang stock rose in 2021 trading, as electric vehicle stocks surged and the excitement around flying taxis increased. However, its value was reduced as tech companies became more growth-dependent. Wolfpack Research's brief report suggesting that EHang was a "complicated stock promotion" and that sales contracts for the company were "largely fabricated", didn't inspire confidence in investors.EHang is still a young company operating in a new market. This makes it difficult to assess its future performance. It could see incredible growth if its flying taxi services are successful. However, investors need to be aware that the stock is a risky investment and there is not much information about the future of the company.