Massachusetts Attorney General Martha Coakley is pressing state regulators to reject auto insurer Progressive Corp.'s plans to hike the rate for commercial customers by 23.5 percent.

Massachusetts Attorney General Martha Coakley is pressing state regulators to reject auto insurer Progressive Corp.'s plans to hike the rate for commercial customers by 23.5 percent.

Auto insurer Infinity Property and Casualty Corp. said Thursday fourth-quarter earnings fell 17 percent as investment gains slipped lower and the year-earlier quarter benefited from a favorable adjustment on losses and expense reserves.

Auto insurer Infinity Property and Casualty Corp. said Thursday fourth-quarter earnings fell 17 percent as investment gains slipped lower and the year-earlier quarter benefited from a favorable adjustment on losses and expense reserves.