Retail Is The Worst Performing Sector Mon., Ahead Of Amazon Prime Day Tues.; SPDR S&P Retail ETF Down 2.1%, Destination XL Group Shares Down 9.8%, Big 5 Down 7.5%, Dicks, Francesca's 6.6%, Express 6.2%, Barnes & Noble 5%, Hibbett, ascena 4.7%, RH 4.4%