The FTSE 100 has had a mixed morning, opening down 0.5 percent before being pushed back into the black by the supermarkets.

Morrisons (TCMKTS:MRWSY) are up nearly 3 percent, with Tesco, who announce half-year financial results tomorrow, (LON:TSCO) trading up 1 percent too.

The FTSE was up nearly 3 percent yesterday, pulled by a huge increase in mining stocks such as Glencore, whose share price rose 21 percent. (LON:GLEN). However, Glencore has fallen back 5.4 percent this morning, with both Rio Tinto (LON:RIO) and BHP Billiton (LON:BHP) following their lead.

Elsewhere on the FTSE, coffee chain Greggs (LON:GRG) delivered a positive report stating that sales were up 4.9 percent on the last quarter, pushing shares up by 4.4 percent. High street retailer Ted Baker (LON:TED) are down 2.3 percent, despite interim results showing strong sales across all regions.

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