This copy is for your personal, non-commercial use only. To order presentation-ready copies for distribution to your colleagues, clients or customers visit http://www.djreprints.com. https://www.barrons.com/articles/yale-university-has-built-a-large-stake-in-slack-technologies-stock-51566127835 Yale University made some big changes in its stock investments in the second quarter, in some cases doing the opposite of what it did in the first quarter.