Hedge fund magnate, Ray Dalio, is optimistic that a meeting between the U.S. and Chinese presidents will help resolve bilateral tensions. The meeting will focus on trade, capital flows, and the two leaders are expected to demonstrate "empathy" and resolve challenges together. Despite rebounding from trade tensions a year ago, the S&P 500 is down more than 3% so far this year due to concerns about the Iran war. Dalio was speaking at a ceremony in Shanghai for a 10-day ocean exploration voyage organised by his non-profit OceanX and U.K.