〔Day Digest〕Hawkish 25bp Hike Lands; Lithium Carbonate Jumps 4%+ to ¥131,500/t and LME Copper Stockpiles Climb Past 250,000t - Industrial Metals Brush Off the Dot Plot

0. Weekly Arc

The Federal Reserve delivered a widely expected 25bp hike - the first in three years - and turned hawkish in the dot plot, yet metals closed broadly higher as the move was already priced ^[1][2]. The split defines the day: lithium rallied on battery-chain restocking, while LME copper inventory built for a third straight session past 250,000t (the highest since late July) and the C-L spread ground to multi-month lows ^[2]. Tin, lead and nickel piggybacked; the WBMS print put a 75,700-ton July copper surplus on the table as the macro overhang ^[3].

1. Policy and Macro Backdrop

• **[NEW] Fed 25bp hike, hawkish tilt:** the FOMC lifted rates 25bp unanimously; the dot plot and press conference read hawkish overall, with the 2027 cut median removed, near-term inflation and 2026 growth forecasts revised up, and a majority of officials backing at least one more hike this year ^[2].
• **[ESCALATED] Tariff uncertainty:** the US has not issued new refined-copper trade measures; the COMEX-LME premium holds near $100/t, weakening the arbitrage that previously pulled metal into US warehouses ^[4][2].
• **[ONGOING] Geopolitics:** Iran-Oman signals on Hormuz transit eased an earlier risk premium, but Middle East volatility remains a recurring swing factor for SHFE aluminum ^[5].

2. Lithium: The Standout Bid

• **[NEW] Main contract +4%+ to ¥131,500/t:** an intraday peak in the Asian morning; a parallel print earlier in the session showed the contract up over 2% at ¥129,160/t ^[6][7].
• **[NEW] MMLC battery-grade +¥1,250/t:** Mysteel's early-session midpoint at ¥128,850/t, signaling restocking demand into the lithium salts chain ^[8].
• **[NEW] GFEX warrants drain:** lithium carbonate warrants fell 1,932 lots to 43,583; polysilicon +210 to 25,090; industrial silicon -20 to 33,420 - the only meaningful draw among the three ^[9].
• **[NEW] Long-term offtake locked in:** Guocheng Lithium and Jinxin Mining signed a lithium concentrate purchase contract for 60,000 dry tons (±20%) over Sep-Dec 2026, total value ~¥900 million, reference price ~¥15,000/t; SMM CIF China spot sat at ~$1,880/t on Sep 17 ^[10].

3. Copper and Base Metals: Inventory vs Demand

• **[NEW] LME inventory moves, Sep 17:** copper +1,750t, zinc +1,575t, lead -2,750t, aluminum -1,000t, tin -25t, nickel flat ^[11]. LME copper has now risen for three straight sessions past 250,000t - the highest since late July ^[2].
• **[NEW] COMEX copper:** slight stock build, Baltimore warehouse transfer continues; the C-L spread sits at multi-month lows ^[12][2].
• **[NEW] SHFE base metals close higher:** SHFE copper +1% at ¥108,500/t, lead +1.9%, tin +1.61%, nickel +1.4%; LME copper flat-to-slightly-firmer intraday before the LME close ^[13][4][2].
• **[ONGOING] Aluminum resilience:** domestic supply growth capped, seasonal demand firm, inventory destocking - SHFE aluminum's structural "independent" trade continues despite the macro headwind ^[5].

4. Tin and the WBMS Read

• **[NEW] WBMS July data:** global refined copper surplus 75,700t in July (Jan-Jul surplus 481,900t, with 202.92Mt produced vs 155.903Mt consumed); global refined tin deficit 200t in July (Jan-Jul deficit 1,100t) ^[3][14]. The copper surplus is the macro overhang; tin's deficit is micro-tight but modest in absolute terms.
• **[NEW] Codelco delay:** Chile's state copper miner pushed its recovery plan to year-end from October, citing a diagnostic process under new CEO Jorge Gómez (joined July); output and cost issues remain unresolved ^[15]. The delay directly affects President José Antonio Kast's pledge to bring unemployment toward ~6% and restore 300,000 jobs by 2030 ^[15].

5. Contrarian and Tail Risks

• **[ONGOING] Supply-chain rewiring:** the Asian Development Bank's May launch of a "Critical Minerals to Manufacturing" financing mechanism targets Indonesia, Philippines, Mongolia, Kazakhstan and Australia, pushing the region from ore export toward mid/downstream value capture ^[16]. Copper's own local-processing story is live in Zambia, where Zambia Industrial Development Corporation (IDC) Chief Investment Officer Mainga Mukando flagged 1.226Mt of installed smelter capacity against a forecast concentrate surplus from 2027 ^[17].
• **[ONGOING] Copper's tariff-trade unwind risk:** RBC Capital Markets analyst Sam Crittenden said the absence of US refined-copper tariffs has cooled physical speculative activity; data-center and renewables demand plus mine disruption remain the supportive narrative, but the LME inventory build tests both legs ^[4][2].
• **Source quality control:** the ADB-financing and "structural aluminum" items draw from single SMM features, not market-priced data ^[16][5]; the WBMS print is the cleanest macro input ^[3][14]; the noon and close SHFE prints disagree on the exact percentage for lead and tin (e.g. noon lead +1.45% vs close +1.9%) because they are different snapshots of the same session - treat the close as the settling print ^[18][13].