 PEMBROKE, Bermuda--BUSINESS WIRE--RenaissanceRe Holdings Ltd. NYSE: RNR the Company or RenaissanceRe today announced it estimates that losses from weather-related catastrophe events and certain losses related to the COVID-19 pandemic will have a net negative impact on the Companys fourth quarter 2020 results of operations. For the fourth quarter of 2020, the Company expects to report net income available to common shareholders; however, it expects to report an operating loss attribut 