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Darren Hepworth, trading and customer services director, pointed out that financials and oil firms dominated the stock market investment agenda.
As well as seeing Solo Oil top the retailer buys list, there was also room for Desire Petroleum and Gulf Keystone in the top four.
The oil companies occupied the top three positions in the retailer sells rankings.
Mr Hepworth explained that Solo enjoyed gains of nearly 250 per cent on its share price after its joint venture partner Reef Resources announced the impending launch of a well in Canada.
He added: "Concerns over Europe's lingering debt problems continued to cast a shadow on the FTSE as it closed down on the week at 5,896.87 [on Tuesday]."
There have also been significant questions asked of the US debt situation this week, with Standard & Poor's downgrading the country's outlook to negative.
Posted by Clive Arneil
