The Warsaw Stock Exchange rebounded Tuesday morning, after a series of declines over the past few days. The WIG20 index increased by 0.5 percent, with trades coming in at PLN 9bn shortly after the opening bell. Poland’s fuel giant PKN Orlen fell Tuesday morning by 1 percent, while the country’s top lenders, Pekao and PKO BP, increased by 1 percent. Poland’s copper giant KGHM, which usually drives the indexes was up by just 0.3 percent at Tuesday’s opening, but market watchers speculate it could go up later in the day.