It is one of the biggest red flags for investors

By Elizabeth Knight
Updated November 21 2017 - 10:28pm, first published 10:20pm
A pedestrian is reflected against the indicator board at the Australian Stock Exchange (ASX) in Sydney, Friday, July 7, 2017. (AAP Image/Mick Tsikas) NO ARCHIVING
A pedestrian is reflected against the indicator board at the Australian Stock Exchange (ASX) in Sydney, Friday, July 7, 2017. (AAP Image/Mick Tsikas) NO ARCHIVING

There are many red flags to provide warnings when buying shares but one that even the most unsophisticated investor can watch out for is a company's directors or senior management selling shares.