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What do the points in a stock market index epresent?
The All Ords Index consists of the 500 largest companies by market capitalisation listed on the Australia Stock Exchange.  Each stock in the All Ords. Index is given a weighting based on its market capitalisation. As the price of the stocks within the All Ords. Index change, so does the points on the index itself.  The Index is more sensitive to changes in the larger capitalised stocks due to their larger weighting in the Index. Example: If a company has a weighting of 10% and its price goes up by 10%, and all other stocks in the Index don't go up or down, then this will cause the All Ords Index to go up by 1% (10% of 10%).