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Why index funds have different prices?
Funds which track the same index may have different nominal prices.  From an investors point of view, this is not important.  What is important is that when the underlying index moves by a given percentage, the price of the tracking funds also move by an equal percentage.  In other words, if the S&P500 rises by 5%, then the price of those funds tracking the S&P500 will also rise by 5%.  Therefore, investing a given amount in any of the tracking funds will produce the same profit or loss, regardless of the nominal prices at which the individual funds are trading. To see this, use the "compare" function available on the popular online charting services. For example, in Google finance call up a chart of the S&P500 index, then use the compare textbox to enter the codes for the various ETFs tracking the S&P500.  You will see that they all track the S&P500 equally so that your relative returns will be equal from each of the tracking funds.  Any small difference in total returns will be attributable to management fees and expenses, which is why low fees are so important in passive investing.