镇洋发展现涨超5%，振幅达20.01%，成交额超4亿元。

Group 1 - The company Zhenyang Development experienced a rise of over 5% in its stock price, indicating positive market sentiment [1] - The stock exhibited a volatility of 20.01%, suggesting significant trading activity and investor interest [1] - The total trading volume exceeded 400 million yuan, reflecting strong liquidity in the market for this stock [1]