Two publicly-listed funds are investing in early-stage commercial litigation. Is this the start of a revolution or a sideshow for a few former lawyers? Richard Lloyd reports

Richard Fields likes antitrust cases; so far he likes them to the tune of $79m (£50m). Since late 2007, when he helped establish and float Juridica Capital Management on AIM, London Stock Exchange’s junior market – raising $180m (£115m) in the process – Fields has been combing the US litigation market for commercial suits for his fund to invest in.