Business Brief: Five files to follow this week

Good morning. In focus today, we’re searching for silver linings, looking beyond lending for profit growth at Canada’s Big Six banks, and sizing up the U.S. Supreme Court’s tariff ruling. Up first In the news Tumbler Ridge: OpenAI did not mention the shooter’s posts, which had caught the attention of employees because they involved gun violence, in a meeting with B.C. officials the day after the mass shooting. De minimis: Six months after a tariff exemption expired, small businesses are scrambling to cope with a labyrinth of rules. Corruption: Canada’s export agency says it lost money on a US$450-million loan…