Copper closed up for a sixth straight day on Tuesday, charging to its loftiest in more than two months, as supply threats in Chile and upbeat US data added fuel to the rally. The near one-percent gain in the copper price bucked the typical bearish impact of a stronger dollar, macro-economic jitters surrounding Europe's debt crisis and potential monetary tightening in top-buyer China.
Perceptions of a tighter supply base and resurgent global demand in the second half of the year continued to steer sentiment. In New York, the key September COMEX contract rose 4.50 cents to settle at $4.3475 per lb, near the upper end of its $4.2825 to $4.3540 session range.