Reproduction permitted only if source is stated. ISBN Non-technical summary Research Question In the course of the European sovereign debt crisis, sovereign risk has become one of the biggest threats to financial stability. We focus on the vulnerabilities of the insurance sector and investigate the following questions: Is domestic sovereign risk transmitted to insurers' default risk? Are insurers affected differently by sovereign risk than other sectors of the economy (i.e. banks and non-financial firms)? What drives the link between sovereigns and insurers? Contribution Despite the importance of insurance companies as financial markets participants, research on risk spillovers between sovereigns and the financial system have usually...