Index Contributors show the individual contribution of the stocks to the total points on the index. A rise in the Sensex by 150 points is as a result of change in price of the stocks in it. Eg: 1.2% rise in Reliance contributing 40 points to the index and ICICI Bank up 0.5% contributing 15 points to the index. At the same time, DLF is down 2% and is contributing negative 10 points to the index. So totally, 25 stocks are up and are contributing 250 points and 5 stocks are down and are contributing 100 points negatively. Thus, effectively the Sensex is up by 150 points.