The Financial Post reports in its Friday edition that CIBC's dominance in electronic trading puts the broker at the forefront of trading for three of the five biggest cannabis firms: Canopy, Aphria and Cronos. A Bloomberg dispatch to the Post says that about 23 per cent of gross volume of Canadian trades in Canopy, for instance, were handled by CIBC World Markets this year, compared with almost 14 per cent with TD Securities. CIBC is second in overall pot stocks trading volume because it is the main Canadian bank-owned brokerage serving market-makers. TD Securities, however, leads trading for most of the large marijuana firms, including Emerald Health Therapeutics, CannTrust Holdings and Supreme Cannabis. Many are on a list of 18 cannabis stocks the firm's investment advisers use for recommending to clients. TD allows advisers to recommend only those cannabis companies listed on the Toronto Stock Exchange or TSX Venture Exchange and that "have no prohibited U.S. touchpoints," TD said in a statement to Bloomberg. TD Securities accounts for 25 per cent of gross trading volume of institutional block trades for the industry this year, compared with 9.7 per cent share for Instinet and 9.4 per cent for RBC Capital Markets.