GDXU is trading at $142.20, down 6.14% from the September 22 close, as a firmer U.S. dollar and expectations for additional Federal Reserve tightening pressured gold. - Spot gold was reported down about 0.6% near $4,334. - U.S.-Iran diplomatic progress reduced safe-haven demand and geopolitical risk premiums; falling oil eased inflation concerns. - The decline follows GDXU’s 11.18% September 22 rally; profit-taking and 3x leverage likely amplified gold-miner weakness.