The markets sold off at Tuesday's midday trading pressured by the strong dollar and weakness overseas. Barnes & Noble (BKS) fell after missing its quarterly estimates. The bookstores chain also gave week guidance for the full year. Lumber Liquidators (LL) backed the trend and rose almost 13%. The company released the agenda for its conference call with investors on the heels of a negative '60 Minutes' report about the safety of its products. After the close, Skyworks Solutions (SWKS) will join the S&P 500. The semiconductor maker replaces PetSmart (PETM), which is being sold to BC Partners, a private equity firm.