Shares of Hallador (HNRG) plummeted 9.96% during intraday trading on Tuesday, as investors reacted to a downgrade from B. Riley. The stock's sharp decline came after the financial services firm lowered its rating on Hallador from Buy to Neutral, signaling a shift in their outlook for the company.

B. Riley's decision to downgrade Hallador was accompanied by a new price target of $17 for the stock. This adjustment in the firm's stance likely contributed to the selling pressure on HNRG shares, as investors reassessed their positions based on the updated analysis from a respected financial institution.

While the specific reasons for the downgrade were not immediately clear, such actions by analysts often reflect concerns about a company's future growth prospects, changes in industry dynamics, or valuation considerations. The market's strong negative reaction suggests that investors are taking B. Riley's assessment seriously, potentially leading to a broader reassessment of Hallador's near-term outlook.