The company reported record performances on two important metrics for the recent quarter. So why are shares plunging?For a mining company like First Majestic (AG +2.16%), reporting a notably higher year-over-year gain in silver production usually leads to a jump in the stock price. Investors are finding, however, that this isn't always the case. The company reported strong third-quarter 2025 financial results yesterday before the market opened, but investors are instead keenly focused on another feature of ...