Prediction markets have priced the Trump-Xi summit. Do the bets have any value?

US President Donald Trump has already announced the date: September 24. That is when, Trump says, Chinese President Xi Jinping will come to the White House for a visit following the “America first” leader’s own three-day trip to Beijing in May. But there is a diplomatic wrinkle. The Trump administration has publicly put the date on the calendar. Beijing has not formally announced Xi’s Washington v