The Canada Pension Plan Investment Board holds $5.9m of stock in two companies profiting from Trump’s ‘zero-tolerance’ Mexico border policyThis story is co-published with the Documented news website and newsletterCanadian politicians have expressed alarm that one of Canada’s biggest pension investment funds has increased holdings in two US private companies that run American prisons and incarcerate the majority of detained immigrants.The Canada Pension Plan Investment Board (CPPIB), which manages $366.6bn in pension funds on behalf of some 20 million Canadian retirees, holds US$5.9m of stock in Geo Group and CoreCivic, according to its latest US Security and Exchange Commission filings.