This article is dealed about the requirements on new architecture of financial markets, namely for banking and insurance market. The principles of Basel II and Solvency II are discussed. The second part of article concerned with quality changes in comercial insurable risk and financial decesion of enormous natural catastrophes in last decade. The traditional way - insurance, reinsurance and public finance is completed by insurance derivates (CAT bondes) in present. This solution takes partial place by financing hurricanes Katrina and Rita claims.