Insurance for corporate transactions, known as representation and warranty coverage (R&W), is becoming increasingly common among buyers and sellers engaged in global mergers and acquisitions. According to Marsh, demand for R&W jumped 35% over the past 12 months, even as M&A fell off.  "Demand for transactional risk insurance has soared as both buyers and sellers worry about how to protect their positions during a deal," says Lorraine Lloyd-Thomas, senior vice president in the private equity and M&A practice at Marsh. 

Some of the increased demand, Lloyd-Thomas says, comes from U.S. buyers and sellers using R&W coverage to counter risks associated with investing in Europe and Asia. U.S. buyers account for 36% of R&W insurance purchased over the past year, with European firms accounting for another 52%. 

Craig Schioppo, managing director for Marsh USA's financial and professional group, says one change over the past year is that large corporations, including Fortune 100 companies, are routinely obtaining coverage for deals in the $50 million to $1.5 billion range. "For deals bigger than $2 billion, we don't see the insurance coverage being purchased," he says.