Against the backdrop of financial problems in the Eurozone, TD Waterhouse customers purchased twice as many shares as they sold in the week to Tuesday 4 October.
Unsurprisingly, some of the UK 's financial giants featured high on investors' priorities, making up half (49%) of top ten buys and 54% of all sells.
Lloyds Banking Group was the most purchased stock during the week, while Barclays was the second most popular share, a reversal from the previous week.
The Royal Bank of Scotland Group also featured heavily, taking the fourth spot in the top ten buys table, while Aviva took fifth place.
All three banks also featured in the sells top ten, with Barclays taking top spot.
Lloyds Banking Group and Royal Bank of Scotland were the second and third most sold stocks in the week.
Away from banks, Europe's largest listed hedge fund manager, Man Group, was the third most purchased stock in the week.
"The company appeared in the top ten following news that it will be doubling the number of job cuts it intends to make by early next year from 200 employees to 400," said Darren Hepworth, global trading and product director at the broker.
"Small cap technology investor, Angle, made seventh place in the buys and fifth in the sells this week accounting for 6.7% of all top ten trades.
"The new entrant has been making headlines after buying an additional interest in its portfolio company, Parsortix, increasing its total stake from 85% to 90%.
"Oil giant BP re-entered the top ten buys in eighth position and dropped three places to ninth position in the sells."
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