United States Antimony (UAMY +7.45%) stock is getting crushed this week. Heading into Friday's market open, the antimony mining specialist's share price had declined by 22% from its level at the end of the previous week's market close.U.S. Antimony released its second-quarter results after the market closed on Tuesday, and the company's sales came in far below Wall Street's expectations. Adding to bearish pressures, management also issued a dramatic reduction for this year's full-year sales guidance. Sales ...