WIG30TR index is calculated and disseminated since September 23, 2013, based on the value of portfolio of 30 major and most liquid companies on the WSE Main List. The base value of WIG30TR index was set at 28 December 2012 at the level 3729.44 points. Unlike WIG30, WIG30TR is the total return index, which means when it is calculated it accounts for both prices of underlying shares and dividend income. All other index construction rules are consistent with the WIG30 index methodology.