GLOBAL COPPER WRAP: Shanghai premium hits 4-month high on improved arbitrage; US, Rotterdam premiums static

Copper premiums surged in Shanghai after import gains over the past week, but remain stable in the United States and Europe.

Arbitrage opportunities prompt higher Shanghai premiumsRotterdam market holds on steady supplies, LME price risesUS market remains stableBonded Shanghai copper premiums soar on arb opportunities   
Fastmarkets' Shanghai copper premium hit a four-month high because of an improved arbitrage situation. 
The benchmark copper Grade A cathode, cif Shanghai premium at $48-66 per tonne on Tuesday January 5, its highest level since late August. 
The arbitrage window opened for some market participants at the beginning of the week, lending support to spot trading interest. 

Imported cargos of electro-refined (ER) cathodes were more sought after than solvent-extraction electrowinning (SX-EW) cathodes, with Fastmarkets' copper grade A...

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