GDP growth slowed to a 2.6 percent annual rate in the fourth quarter, from 5.0 percent in Q3. Despite the deceleration in the headline number, however, the report was strong where it counts. Consumer spending, the mainstay of the U.S. economy, accelerated to a 4.3 percent annual growth rate, the strongest gain since 1993. The slowdown in overall growth stems from a decline in net exports due to weaker growth abroad and a stronger dollar.