〔Overnight Brief〕COMEX Copper Jumps More Than 2% to $6.37/lb as Aluminum Backwardation Squeezes Supply - Tin Demand Seen Falling 2.2%

0. Overnight Arc ^[1][2][3]

• **[NEW] Copper led:** COMEX copper futures rose more than 2% to $6.37/lb, while LME copper gained $128 to $13,896/t ^[1][4]
• **[ESCALATED] Aluminum tightened:** Falling stocks pushed LME and Shanghai into backwardation, with spot above deferred futures because immediate deliveries were constrained ^[2][5]
• **[NEW] Tin diverged:** ITA expects refined tin use to fall 2.2% in 2026, even as Alphamin signed an agreement to supply up to 3,600 tonnes of tin-in-concentrate annually for two years ^[6][3]

1. Copper: Price Strength Meets Macro Resistance ^[7][8]

• **[NEW] Price board:** COMEX copper rose more than 2% to $6.37/lb; LME copper gained $128 to $13,896/t; SHFE main-contract copper rose 0.37% to CNY105,500; and the international copper night session gained 0.78% while Shanghai copper rose 0.5% ^[1][4][9][7]
• **[NEW] Physical support:** SMM said raw-material supply was tight, domestic producers had less incentive to refine, spot copper was tight, social stocks kept falling and spot premiums remained high ^[7]
• **[NEW] Inventory split:** LME copper in U.S. warehouses kept accumulating, making hidden inventory more visible, while SHFE and domestic social stocks kept declining ^[7]
• **[NEW] Macro brake:** SMM said U.S. October nonfarm payrolls beat expectations and unemployment fell, increasing December Federal Reserve hike bets and a dollar rebound that limited nonferrous metals ^[7]
• **[ESCALATED] Bearish macro case:** TD Securities Managing Director and Global Commodity Strategy Head Bart Melek said copper remained under downside pressure after Democrats gained advantage in U.S. midterms, as expected tariff implementation cooled and AI data-center plans in Democratic-leaning states could face greater resistance ^[8]
• **[ONGOING] Weekly context:** LME three-month copper had fallen $75.50, or 0.55%, to $13,768/t on Friday and lost 2.73% for the week, its largest weekly drop since the week ending March 20 ^[8]
• **[NEW] Downstream warning:** At SMM’s conductor-cable conference, Shanghai Huiye Law Firm receivables head Wang Congwei said that over nearly 30 years the Chinese cable industry’s revenue rose about 45 times and receivables about 100 times, while receivable days, receivables as a share of revenue and industry pressure increased and margins fell ^[10]
• **[NEW] Source conflict:** TD Securities’ bearish path depends on political and data-center assumptions, while SMM’s support rests on current Chinese inventory and spot-premium data; BMI countered that mine disruptions and tight supply outside the U.S. would limit downside ^[7][8]

2. Aluminum Backwardation Meets a $3,000/t Anchor ^[2][4][11]

• **[ESCALATED] Squeeze:** Bloomberg described a major aluminum supply squeeze in which buyers faced rising spot-metal prices with little immediate prospect of relief as stockpiles declined ^[2][5]
• **[ESCALATED] Inventory:** LME aluminum stocks fell 56% in 2026 to their lowest level since 1990 ^[2]
• **[ONGOING] Supply horizon:** Indonesian production growth could push the global market into surplus in coming years, but supply constraints could worsen before new cargoes arrive ^[2]
• **[NEW] Price tension:** LME aluminum settled $4 higher at $3,066/t, while Citi maintained a neutral market view and a $3,000/t target for the next zero to three months ^[4][11]
• **[NEW] Alumina overlay:** Alumina’s night session rose 0.57%, and a union plans a strike at South32’s alumina plant with wage demands benchmarked against the Alcoa acquisition case, although the brief gives no strike date, duration or production estimate ^[9][12]

3. Tin: New Concentrate Meets Contracting Use ^[6][3]

• **[NEW] Demand:** The International Tin Association’s Tin Use Study 2026, released on November 6, estimates that refined tin use unexpectedly fell 1.3% in 2025, largely because Chinese industrial activity weakened, and expects a further 2.2% decline in 2026 as China’s solar slowdown, macroeconomic weakness and financial pressure from record-high prices weigh on demand ^[3]
• **[NEW] Supply:** Alphamin Resources will sell concentrate from its Bisie mine in eastern DR Congo to U.S. recycler Nathan Trotter’s new smelter, supplying up to 3,600 tonnes of tin-in-concentrate annually, approximately one-fifth of Bisie’s annual production, for an initial two-year period ^[6]
• **[NEW] Price check:** LME tin fell $28 to $46,439/t, while Shanghai tin’s night session fell 0.37% ^[4][9]
• **[ONGOING] Balance test:** The new concentrate agreement adds supply while ITA expects use to contract, but the packet provides no absolute 2026 refined-tin volume forecast with which to quantify the balance ^[6][3]

4. Cross-Metal Board and Trade Flows ^{[4][9][13][14]}

• **[NEW] LME close board:** Aluminum rose $4 to $3,066/t, zinc gained $20 to $3,731/t, lead was flat at $1,886/t, nickel fell $128 to $16,225/t, tin fell $28 to $46,439/t and cobalt was flat at $33,525/t ^[4]
• **[NEW] China night board:** International copper rose 0.78% and Shanghai copper gained 0.5%; Shanghai aluminum fell 0.22%, Shanghai zinc fell 0.38%, Shanghai lead rose 0.22%, Shanghai nickel fell 0.63% and Shanghai tin fell 0.37%; alumina rose 0.57%, aluminum alloy fell 0.38% and stainless steel fell 1.41% ^[9]
• **[NEW] Tungsten costs:** Zhangyuan Tungsten said rising tungsten raw-material prices had substantially increased production costs, so it will apply new prices to cemented-carbide products from November 10 ^[13]
• **[NEW] Chile exports:** Chile’s central bank reported October copper exports of $5.409 billion and lithium exports of $336.35 million ^[14]
• **[NEW] Thin lithium datapoint:** Jin10 Data included a November 9 spot-price daily report for 99.5% battery-grade lithium carbonate and spodumene concentrate, but the packet provides no price figures ^[15]

5. What Would Change the Call ^{[2][6][7][8][12]}

• **[ONGOING] Aluminum:** The decisive near-term variable is the timing of new arrivals, because the current squeeze has little immediate relief while future Indonesian supply could tip the market into surplus ^[2]
• **[NEW] Copper:** Monitor whether continued LME U.S. accumulation offsets falling SHFE and Chinese social stocks, and whether U.S. tariff and data-center assumptions change ^[7][8]
• **[NEW] Tin:** Monitor first deliveries under the Alphamin agreement and whether ITA’s projected 2.2% decline in 2026 refined-tin use materializes ^[6][3]
• **[NEW] Alumina:** The packet gives no strike date, workforce, duration or tonnage impact, so the strike headline cannot yet be translated into a supply loss ^[12]
• **[ONGOING] Source quality:** The aluminum squeeze is described both in a Sina Finance report carried by Tonghuashun and by Bloomberg, the copper outlook combines SMM’s physical-market account with TD Securities’ forecast, and the lithium entry is only a report title without values ^{[2][7][8][5][15]}