Global credit ratings agency Fitch Ratings said although insured losses could escalate "substantially" as the floods engulf Brisbane and Ipswich, Australia's major insurers have comprehensive reinsurance protections for earnings and claims payments. Suncorp Group Ltd originated $1.9 billion in premiums from Queensland in the 12 months to June 30, 2010, giving it the biggest exposure to the flood-ravaged state of all major insurers.