joonix: you're quoting out of context, and you're a brand new user... that's interesting. As Silver explained right above the sentence you quote, a sophisticat

joonix: you're quoting out of context, and you're a brand new user... that's interesting. As Silver explained right above the sentence you quote, a sophisticated trader could have easily arbitraged the spread by buying Betfair's Romney contract at $0.37 per dollar, while simultaneously shorting Intrade's Romney contract at $0.45 per dollar -- a sure thing! Silver then added that $18K "...is a large bet in everyday terms, but not by the standards of a professional gambler or investor who felt he had a sure thing." A truly sophisticated investor seeking to make millions instead of merely thousands, he explained, would look to larger, more liquid markets -- like the stock market. Please don't quote out of context again.