The Globe and Mail reports in its Monday edition that last week, Bank of Montreal chief investment strategist Brian Belski became the latest finance heavyweight to warn his social-media followers about imposters posing as him to scam investors. The Globe's Mariya Postelnyak writes that Mr. Belski alluded to bogus Instagram and Facebook ads under the account name "BMO Belski," which sought to lure users to investment groups on WhatsApp through AI-generated videos and other content. "To be clear: I only post from this official LinkedIn account and do not engage on other social platforms," the real Mr. Belski wrote on LinkedIn. To those who have seen the hyperrealistic videos purporting to show Mr. Belski turning his head from side to side, promising to "share three stock picks and the latest market insights every day" with his WhatsApp community, this may have come as a surprise. While scams impersonating celebrities and politicians have proliferated for years, fraud targeting investors through fake advice from big names in finance is now multiplying, with the real experts struggling to get the content taken down. Last week, prominent Bay Street economist David Rosenberg spoke out about a scam that used his identity.