Tesla (TSLA.US) 's stock price plunged more as the market proceeded on Tuesday amid fading U.S. consumer confidence, concerns over potential tariffs, and halved European sales.The stock slid as much as 9% to bottom at US$300.11. The company’s market cap slipped below US$1 trillion, with the stock still down over 8% in the latest trading. Related NewsU.S. Reportedly Pondering Tax Relief for Mfg Exports, Likely Extending to Service ExportsTesla’s sales in Europe last month plummeted by nearly 50%, with its market share shrinking from 1.8% to 1%, data revealed. The slump in Tesla’s stock weighed on other big techs, with Nvidia (NVDA.US) and Amazon each cratering around 3%. This dragged the Nasdaq Composite down by approximately 340 points, or 1.8%, to 18,941 in the latest update.(Real-time Streaming US Stocks Quote; Except All OTC quotes are at least 15 minutes delayed.)