Oil prices slide to 11-day low on hopes of U.S.-Iran diplomacy, Saudi exportsBusinessSep 21 at 2:52 AM – Sep 21 at 11:29 AM3 outletsThe Globe and MailOil prices slide to 11-day low on hopes of U.S.-Iran diplomacy, Saudi exports seen Sep 21 at 6:10 AMThe NationalOil prices slide on hopes diplomacy at UN will help end Iran conflict seen Sep 21 at 2:52 AMUPIStock prices up as oil prices slide Sep 21 at 11:29 AM