South32 has lifted the Sierra Gorda ore reserve in Chile by 61% to 1.1 billion tonnes at 0.39% total copper, 0.016% molybdenum and 0.06 g/t gold (0.46% CuEq), extending reserve life by about five years to 2045 after 85,000 metres of infill drilling from 200 holes. The updated MRE now stands at 1.87 billion tonnes at 0.37% copper (0.44% CuEq), with the orebody remaining open at depth and additional potential at the Catabela Northeast target. A fourth grinding line, approved in July, is expected to lift copper output by roughly 30% from 2031, reinforcing long-term concentrator planning and infrastructure requirements.

Agnico Eagle Mines is investing C$57.2 million in Radisson Mining Resources for a 10.5%–14.9% stake to advance underground access and infrastructure at the historic O’Brien gold mine in Quebec’s Bousquet-Cadillac camp along the Larder Lake-Cadillac Break. Funding will support an access ramp, underground workings, surface facilities and water management, complementing Radisson’s fully funded 140,000-metre surface drilling and a planned 11-year underground operation with toll milling at IAMGOLD’s Doyon plant. A July 2025 PEA at US$3,300/oz gold pegs O’Brien’s after-tax NPV5 at C$871 million with a 74% IRR, underpinned by recent intercepts such as 5.1 m at 316.31 g/t from 823 m.

Gold climbed 1.2% to around $4,719/oz in New York, near a four‑month high, after reports that US Treasury Secretary Scott Bessent may tap the $935 billion Treasury General Account to fund a “Treasury Twist” bond‑buyback scheme targeting higher‑yielding long‑dated securities. The 10‑year yield slipped to about 4.69% and the 30‑year to roughly 5.215%, still close to last week’s 19‑year high above 5.27% that triggered expanded buybacks from $2 billion to at least $4 billion. Silver fell about 1% to consolidate below $70/oz resistance, while copper added 0.46% and trades just under record levels.