President Trump will meet with Ukrainian president Volodymyr Zelenskyy and other European leaders to discuss the war in Ukraine, something Kevin Hincks expects to moves markets to start the trading week. Also on the docket: Jackson Hole and what will likely be Fed chair Jerome Powell's final speech at the summit. On the earnings front, retail companies will dominate investor interest during a week that also has a new retail sales report. Kevin sees Walmart's (WMT) earnings as an economic barometer.