Environmental insurance has remained a buyer's market because of expanding capacity, even after the multibillion dollar Deepwater Horizon oil spill in the Gulf of Mexico in 2010. "Because BP is self-insured for a majority of that risk, we haven't seen that loss impacting the insurance marketplace," said Mike Szot of Aon Risk Solutions. Capacity has waned, however, for remediation stop-loss coverage, for which cost overruns are a big problem. "That's not to say you can't put [a stop-loss program] together. However, those types of policies and coverages are few and far between," Szot said.