Marco Polo's Aaron Boesky calls a China market floor

The Shanghai index has fallen more than 30% since its recent peak in August last year. Enough already, says Aaron Boesky, chief executive of Marco Polo Pure Investments in Hong Kong, who has made what he claims to be his most high-conviction call ever that this is a market bottom. So, Aaron Boesky, what are you calling?We're calling a bottom in July 2010, and think we're accurate on this call. The reasons being that Shanghai is near the lowest valuation level in history and at the sa…