"Shares of Simco Song Da Joint Stock Company (HNX: SDA) plummeted on May 19th, following an announcement by the Hanoi Stock Exchange. The exchange has decided to impose trading restrictions on the stock starting May 21st due to a delay in submitting its audited financial statements for the year 2024. With this development, traders are left wondering about the future performance of SDA and its ability to rebound from this setback."