首开股份尾盘跳水跌停，成交额超30亿元创逾十年新高。

Group 1 - The company, Shoukai Co., experienced a significant drop in stock price, hitting the daily limit down, with a trading volume exceeding 3 billion yuan, marking the highest level in over a decade [1] - The sharp decline in stock price indicates potential concerns among investors regarding the company's future performance and market conditions [1] - The trading activity suggests heightened volatility and investor sentiment, which could impact the company's market position and investor confidence [1] Group 2 - The record trading volume reflects increased interest and activity in the company's shares, which may be driven by recent news or market trends [1] - The company's stock performance could be influenced by broader industry trends and economic factors affecting the real estate sector [1] - The situation warrants close monitoring as it may present both opportunities and challenges for investors in the real estate market [1]