Copper prices at 4-year low

Copper prices fell on world markets to a 4-year low yesterday, with New York March futures settling at $2.7585 a pound.    That's down from $3.38 a year ago.

Arizona produces about 2/3 of the copper used in the U.S. and Phoenix-based Freeport McMoRan Copper & Gold is the world's largest primary copper producer, so the price has potentially significant impacts to the economy.