Copper rises after four-session decline

Copper prices rose on Friday after slipping for four consecutive sessions, ahead of Fed Chair Yellen's speech later today. 

Copper last traded at $2.082 a pound, up from the opening price of $2.077, with an intraday high at $2.095, and a low at $2.077. 

Copper's earlier decline came amid lower demand on commodities in the markets as they enter into profit-taking mode due to negative global growth forecasts. 

Copper on the other hand returned higher today as the dollar retreated amid dithering the markets as traders wait to take clues on interest rates and monetary policy from Janet Yellen later today. 

The dollar index, which tracks the greenback against an array of six main currencies, fell to 94.59 from the opening of 94.69, with a session-low at 94.48, and a high at 94.70, after the index hit its highest this week at 94.95.