Shares of Masan Group Corporation (HOSE: MSN), chaired by billionaire Nguyen Dang Quang, surged again in the morning session on October 17th, reaching 91,100 VND per share—the highest level since February 2023. This follows an unexpected ceiling-hit on October 16th, driven by a remarkable 44 million share block trade, creating a significant ripple effect across the market.