Olympic Games profits from the Olympic symbols. The IOC also takes a percentage of all sponsorship and broadcast income. Host cities continue to compete ardently for the right to host the Games, even though there is no certainty that they will earn back their investments. Research has shown that trade is around 30 percent higher for countries that have hosted the Olympics. The Olympic Movement uses symbols to represent the ideals embodied in the Olympic Charter. The Olympic symbol, better known as the Olympic rings, consists of five intertwined rings and represents the unity of the five inhabited continents (Africa, America, Asia,
Olympic Games ceremony days, in the Olympic Stadium, and are thus the last medal presentation of the Games. In contrast to the opening ceremonies, many elements of the Olympic closing ceremonies gradually developed more by tradition than official mandate. Like the opening ceremonies, the closing ceremonies begins with the raising of the host country's flag and a performance of its national anthem. The traditional part of the closing ceremonies starts with the "Parade of Flags", where flag bearers from each participating country enter the stadium in single file, with the Greek flag in the lead (honoring the birthplace of the Olympic Games) and