Still, he said Arch’s diversified operations across specialty insurance, reinsurance and mortgage insurance provide opportunities to deploy capital where returns remain attractive. Reinsurance net premiums written fell 10.4% year over year as clients retained more risk, property rates declined and Arch increased purchases of traditional reinsurance and third-party capital. The U.S. mortgage insurance portfolio delinquency rate was unchanged at 2.1%, while favorable reserve development continued at a slower pace than in earlier quarters. About Arch Capital Group (NASDAQ:ACGL)Arch Capital Group Ltd. (NASDAQ: ACGL) is a Bermuda-based insurance and reinsurance holding company that underwrites a broad range of property and casualty, mortgage, and specialty risk products. Arch’s product mix includes treaty and facultative reinsurance, primary casualty and property insurance, mortgage insurance and other specialty lines.