In a series of tweets issued Tuesday, Tobias Lütke, Shopify's CEO, said lots of people want him to address the "short-selling troll" targeting Shopify. Shopify is "a company that has mastered the good old get rich quick scheme," Left said, saying he can't account for as much as 90 per cent of the company's customer base. Contacted by Bloomberg, Left is reported to have said Lütke's Twitter response "shows his immaturity as a CEO." After closing at $145.70 on the TSX on Oct. 3, Shopify shares plunged to $128.95 the next day, following the issue of Left's report. The stock lost ground each subsequent trading day until Wednesday, when it closed up more than two per cent, adding $2.64 to end at $118.40 on the TSX.

Source: CBC News October 11, 2017 15:13 UTC