US retail sales slump unexpectedly and sharply after a summer tax-refund boost fades AP NewsFrustrated US consumers cut their retail spending last month CNNMidday Need to Know: Retail sales drop, Ackman shakes up portfolio & more (SPY:NYSEARCA) Seeking AlphaUS retail sales weakest in over a year, consumer sentiment plunges Yahoo FinanceUS Retail Sales Fall by the Most in More Than a Year Bloomberg.com