In a downtown Toronto skyscraper one block away from the Hockey Hall of Fame, a small hedge fund is hoping it has found an edge in financial markets. Castle Ridge Asset Management is betting on Wallace, a purpose-built supercomputer behind the hedge fund’s trading strategies driven by artificial intelligence.For years, hedge-fund players have wondered if AI could help them beat the market, but AI-trading efforts they launched often led to disappointment and amounted to little more than marketing schemes to ...