Contingent factors of the coinsurance function of internal capital markets: Evidence from the US nonlife insurance industry

By analyzing intragroup reinsurance activities in the US nonlife insurance sector from 1999 to 2016, we provide evidence that the coinsurance function of internal capital markets is contingent on internal capital providers' financial resources and the relative sizes of capital receivers within the group. We demonstrate that insurance groups commonly use intragroup reinsurance (a sub-stitute for capital) to support insurers that sustain underwriting losses. Larger insurers are more likely to obtain internal reinsurance if their affiliated insurers hold more financial resources. Our findings show that the financial capabilities of group members providing support affect the feasibility of the coinsurance function through the activities of internal capital markets. Group members with greater influence are more likely to benefit from the coinsurance function.