The volume of stock trades increased by more than 50% over the last week, as investors monitored the ongoing problems in the Eurozone.
There is mounting speculation that Greece could be forced out of the Eurozone, with fears that the troubled nation could soon run out of money.
The situation sent shockwaves through Eurozone economies, as the FTSE 100 dropped to its lowest level since December 2011, finishing at 5465.52.
TD Direct Investing says it saw its clients buying two times as many shares as they sold off during the week, with oil and gas explorer, Gulf Keystone Petroleum, the most bought and sold stock during the week.
As usual, the UK 's banks also featured prominently in the minds of investors.
Barclays was the second most purchased equity during the week, while Lloyds Banking Group featured in third in the top ten buys.
Royal Bank of Scotland (RBS) was the sixth most purchased share, as was the case last week.
All of the banks also featured in the top tens sells table, with Lloyds the most highly placed in second.
RBS followed in third place, while Barclays was the fifth most sold stock.
Elsewhere, Aviva Plc was the fifth most popular buy among investors, following recent shareholder anger at the company's remuneration plans, which eventually led to the departure of the company's CEO, Andrew Moss.
Following Moss' resignation announcement, shares in the British insurer reached a week high of 319p on Tuesday (8 May) but dropped back to close at 290.27p on Monday (14 May).
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