Two reports published yesterday by ratings agency A.M. Best on U.S. captives and risk retention groups (RRGs) point to continuing growth in these alternative market mechanisms, even amid soft market conditions. A number of trends are highlighted, but one interestingÃ‚ nugget is that medical malpractice accounts for a significant portion of business for both captives and risk retention groups. According to the reports, medical malpractice continues to be the dominant line of business for domestic captives (close to 40 percent), while medical malpractice (claims made) accounted for 43 percent of RRG business in 2006. Which leads us to conclude that despite greater stability in the price of medical malpractice insurance and some improvement in the tort environment, doctors are not looking to return to the traditional market in a hurry. Check out I.I.I. updates on captives and alternative risk transfer mechanisms and on medical malpractice online.