The three-month official London Metal Exchange price was at $1,470.5 per tonne on January 4, and rose to $1,642.25 per tonne on April 26.
The rise in the Shanghai Futures Exchange was steeper, with the price hitting a 10-month high two days ago at 12,830 yuan ($1,976) per tonne.
The futures rally comes on the back of promises from the Chinese government of maintaining a 6.5% growth rate in the 2016-2020 period and assurances that market forces will be allowed to have a greater say in the shaping of the economy.
The bullish mood in futures markets has also been augmented by trade data.
Chinese copper imports hit a historic high of 570,000 tonnes in March, a 40% year-on-year rise.
The resurgence in oil prices, which surged to a multi-month high on April 27, and the slowing rise of the US...
