Retail imports should be up 3.2% this month vs. 2015, as stores bring in the last of holiday merchandise, according to the monthly global port tracker from the National Retail Federation and Hackett Associates. The numbers come as NRF is forecasting $655.8 billion in holiday sales, a 3.6% increase over last year. The NRF saw the increase as a good sign for both the retail industry and the economy overall heading into the latter part of the holiday rush.