〔Overnight Brief〕LME Copper Marks Third Straight Record at $14,858.50/t on Tariff-Driven US Rerouting; Brent Above $100 on Iran Tanker Strike Caps the Macro Bid - Squeeze vs Fed Risk

0. Overnight Arc

Copper set records on three exchanges in a single session - LME three-month at $14,858.50/tonne, NY copper at $6.894/lb, SHFE main above 110,000 yuan/tonne - extending a three-day record run on the LME ^[1][2][3]. The driver is identical across venues: tariff expectations rerouting physical metal into the US and tightening ex-US supply ^[1][2]. Yet the same session delivered a parallel shock - Brent above $100/barrel after a US attack on an Iranian oil tanker - that reopens the inflation and Fed debate and caps the macro upside ^[2].

1. Price Action

• **[NEW] LME three-month copper intraday peak $14,858.50/tonne**, surpassing the prior session's $14,779.00; official settle +$59 at $14,768 ^[2][4].
• **[NEW] NY copper $6.894/lb, all-time high** ^[2].
• **[NEW] SHFE main copper above 110,000 yuan/tonne** ^[1].
• **[NEW] LME three-month print at $14,782/tonne, +0.5% intraday, before extending to the record peak** ^[5].
• **[NEW] LME night complex settles mixed-to-firm:** tin +$356 to $55,218, zinc +$30 to $4,052, nickel +$29 to $16,897, aluminum +$16 to $3,357, lead flat at $1,914, cobalt -$750 to $42,940 ^[4].
• **[NEW] SHFE night session broad bid:** international copper +0.81%, SHFE copper +0.71%, aluminum +0.37%, zinc +1.22%, nickel +1.04%, tin +1.53%; lead -0.34%, alumina -0.72% ^[6].

2. Mechanism

• **[NEW] Tariff flow distortion:** traders pre-positioned tens of thousands of tonnes of copper into the US on the expectation of a Trump-administration tariff on refined copper imports, draining London physical availability and pulling the LME benchmark to fresh highs ^[1][2].
• **[ONGOING] Tight fundamentals:** global copper concentrate supply is constrained, inventories are falling and the spot market remains tight - the precondition that let the tariff channel translate into price ^[1].
• **[NEW] Downstream confirmation:** a copper foil supplier reported August HVLP shipments of 500 tonnes against robust downstream procurement demand, corroborating the spot tightness ^[7].

3. Inflation/Fed Cross-Current

• **[NEW] Brent above $100/barrel** after the US struck an Iranian oil tanker, reigniting inflation fears and worry about the Fed policy path - a direct headwind to copper's macro bid ^[2].
• **[ONGOING] Industrial view:** upside beyond the current high range now depends on the Fed monetary-policy path and the specifics of the US refined-copper tariff, not the spot squeeze alone ^[1].

4. Adjacent Markets and Policy

• **[NEW] Brazil critical-minerals bill:** Senate approved legislation creating a presidential commission to review control changes of strategic-mineral firms; rules may tie exports to tech or value-add requirements and compel disclosure of buyers, beneficial owners and processing depth ^[8]. Context: USA Rare Earth agreed in April to buy Serra Verde - Brazil's only large-scale producing rare-earth miner, all four magnet REEs (Pr/Nd/Dy/Tb) - for ~$2.8 billion ^[8].
• **[NEW] Asian alumina paradox:** an Australian spot bulk deal pushed Asian alumina +$4.5, yet the market faces ample supply and firm external prices - a contradiction awaiting resolution ^[9].
• **[NEW] KGHM-BHP MOU:** the two miners signed an MOU to explore areas of mutual interest ^[10].
• **[NEW] Structural copper thesis:** long-term supply remains a problem beyond the cyclical squeeze; the cyclical move is layered on a structural deficit ^[11].

5. What Would Falsify It

• A clear US refined-copper tariff postponement or scope narrowing would unwind the physical-flow channel and relieve London tightness ^[1][2].
• A sustained Brent drawdown below $100 would lift the inflation/Fed cap and re-rate the macro bid ^[2].
• A formal Brazil strategic-minerals control ruling blocking a major inbound deal would tighten global supply and reinforce the structural argument; the implementing regulations - which the bill leaves to government - will decide how broadly the screen bites ^[8].

Source quality flags: items ^[7], ^[9] and ^[10] are single-source industry notes or bare headlines; treat the $14,858.50 peak, the $14,768 settle and the Brent-above-$100 print as the only fully-attributed records ^[1][2][4][5].