Chicago | Reuters — U.S. soybean futures rose for a fourth consecutive session on Friday as China said it would waive import tariffs for some U.S. farm products, renewing optimism for a possible trade agreement between Washington and Beijing. Tariff waivers will be based on applications by individual companies for U.S. soybean and pork imports, China’s finance ministry said in a statement, citing a decision by the country’s cabinet. It did not specify the quantities involved.