NEW YORK ( TheStreet) -- Copper prices have zoomed in the last two trading sessions. Copper for three-month delivery on the London Metal Exchange closed at $7,850 per ton on Tuesday from $7,770 per ton at close on Monday.Copper stocks have rallied in trades on Monday and Tuesday as dropping inventories signal a revival in copper demand across the world. In the last two days, Freeport-McMoRan Copper & Gold ( FCX) has risen 5.7% to $83.66, Southern Copper ( SCCO) is up 3.3% to $31.91, while Teck Resources ( TCK) has surged 7.4% to clock a 52-week high of $43.30. The outlook on these stocks continues to be positive. Freeport-McMoRan has 13 buys, five holds and one sell rating, while Teck Resources has seven buys, two holds and no sell ratings, according to TheStreet's analyst ratings guide.