1979: (FILE PHOTO) Thursday, October 27, 2011 is the 25th Anniversary of the 'Big Bang,' the day when the London Stock Exhange's rules changed, closing its stock floor and moving it to electronic ... more 
1979: (FILE PHOTO) Thursday, October 27, 2011 is the 25th Anniversary of the 'Big Bang,' the day when the London Stock Exhange's rules changed, closing its stock floor and moving it to electronic trading. Please refer to the following profile on Getty Images Archival for further imagery. http://www.gettyimages.co.uk/Search/Search.aspx?EventId=130558202&EditorialProduct=Archival# British Conservative leader, Margaret Thatcher, visits the London stock exchange in Feburary 1979 in London, England. (Photo by Steve Burton/Keystone/Getty Images) less 
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Getty Images | Photo By Steve Burton / Getty Images
Tue, Oct 25, 2011 10:40 AM EDT