 LONDON, Sept. 08, 2021 GLOBE NEWSWIRE -- Global reinsurers performed well in the first half of 2021, with a further expansion of their capital bases and strong headline underwriting results and ROEs. Underlying ROEs, while less strong, were nonetheless noticeably improved, according to the latest Reinsurance Market Report from Willis Re, the reinsurance business of leading global advisory, broking and solutions company Willis Towers Watson NASDAQ: WLTW. 