The FTSE has dipped 1% after a steady morning session as sentiment was hit following China's move to curb rising inflation in the country.
The FTSE leapt to a six-month high on Thursday thanks to bumper corporate results across Europe and the US and a strong showing from miners.
The FTSE has extended early gains after figures showed inflation eased in July, with financials and mining stocks leading the charge into positive territory.
The FTSE is heading for a sixth straight weekly gain amid speculation a bailout for Greece is imminent.
Miners continue to lead the FTSE 100 into positive territory after rising copper prices led to a strong showing yesterday.
The FTSE 100 opened lower, down 39.78 points or 0.76% to 5220 over worries about global growth following announcements in China and the US.
Van Eck Global has unveiled an ETF providing access to small and mid-cap global gold mining companies on NYSE Arca.