article_snippet: The discovery was made by finance technology company Quantopian, which ran two imaginary $100,000 investment funds using stock data from 2002-2014.
article_snippet: (right) all brought in substantial returns for shareholders during shareholders tenures .
article_snippet: According to a report by Fortune magazine, the best performers were HSNi, which runs the home shopping network, and Ventas, a healthcare company which runs housing estates for the elderly.
article_snippet: HSNi has been run by Mindy Grossman since 2006, and Ventas by Debra Cafaro for the whole 12-year period - both women returned more than 500 per cent on initial investments.