QBE Insurance Group has flagged a half-year net loss after tax of $US750 million ($A1.1 billion), reflecting the impact of the COVID-19 pandemic, higher claims and a loss on its investment portfolio.

QBE Insurance Group has flagged a half-year net loss after tax of $US750 million ($A1.1 billion), reflecting the impact of the COVID-19 pandemic, higher claims and a loss on its investment portfolio.