Spain's BBVA books quarterly loss of $172 million on U.S. impairment

MADRID (Reuters) - Spanish bank BBVA said on Friday it booked a loss of 155 million euros (130.86 million pounds) in the fourth quarter due to one-off impairment charges in its U.S. business, offsetting solid performance from its Mexican unit.Analysts in a Reuters poll had expected BBVA to book a loss of 326 million euros.A decline in interest rates and an economic slowdown in the United States, which accounts for nearly 10% of the bank's earnings, triggered a negative adjustment of $1.5..