The story in The Australian says that after HSBC moved their brochure site ( which had been problematic even given it's simplicity) to Linux the "system performed flawlessly" and that the banks management "champion[ed] the cause of open source software".

HSBC used Linux and other open source software to develop their trading system and have been thrilled with the results. "The environment was developed in seven weeks ... includ[ing] the web interface, .. [and] ... data feeds such as the Australian Stock Exchanges ... The bank claims to have made a return on its investment within eight to 10 weeks - and that it has been running with only minor modifications for four years - it has proved enormously profitable."