The Globe and Mail reports in its Saturday edition that Canadian public companies are required to meet a higher standard of disclosure to avoid increased shareholder lawsuits following a landmark ruling by the Supreme Court of Canada. The Globe's Jameson Berkow writes that it ruled that investors can sue companies for failing to promptly disclose material changes in operations, clarifying the definition of "material change" that experts had awaited for over a year. Faskin lawyer Sarah Gingrich says the ruling "is going to lead to the requirement for more disclosure." She says, "For Canadian public companies, the key reason they won't be happy with the ruling is it means the bar for something qualifying as a change is now lower than it has been." Gowling lawyer Frank Sur says the decision will also make it easier for investors to file class-action lawsuits against companies over alleged disclosure failures. Friday's decision focused on whether Lundin Mining should have quickly informed the public about a late 2017 rock slide that temporarily closed part of its Chilean copper mine. When Lundin eventually disclosed it over a month later, its stock plummeted 16 per cent in one day, erasing over $1-billion in market value.