TerrAscend Corp. stock fell 11.8% on Tuesday, marking its largest one-day percentage drop since July. Trading volume reached approximately 258,905 shares by midday, more than doubling the 30-day daily average of 104,000 shares. This decline followed the company’s announcement of revised fiscal guidance for the upcoming quarter, which trimmed full-year revenue estimates by 5%. Investors reacted to management’s projection of slower sales growth in Ontario and Pennsylvania, two key medical cannabis markets where TerrAscend operates 12 licensed cultivation and retail facilities. The stock had closed 10% higher over the previous five trading sessions, but the sudden reversal wiped out those gains.