Correlation Study on Nifty Stocks
The correlation between any two stocks (or sets of variables) summarizes a relationship, whether or not there is any real-world connection between the two stocks. The correlation coefficient will always be between -1 and +1. These two extremes are considered perfect correlations. A negative coefficient means that the two stocks,, will move in opposite directions (if one stock increases, the other will decrease); a positive coefficient will mean that the two will move in the same direction (as one increases, the other will increase). And if Correlation is zero(perfectly uncorrelated) or almost zero then both the stock will behave independently
About Correlation Table
Correlation table is a two-dimensional matrix that shows correlation coefficient between pairs of securities. The cells in the table are color-coded to highlight significantly positive and negative relationships.
(Click on the Picture for Big Table)
Here i had taken randomly some 15 stocks from the Nifty 50 Pack with the sample duration between 1st Jan 2009 – 14 Dec 2009 and the correlation table is presented above. Also Highly correlated pairs (Both Positive & Negative ) and Zero Correlated Pairs are identified from the above table
An Investopedia article explains how USD is correlated with the US Indices
If we compare the US Dollar Index (USDX), an index that tracks the value of the U.S. dollar against six other major currencies, and the value of the Dow Jones Industrial Average (DJIA), Nasdaq and S&P 500 over a 20-year period, the correlation coefficient calculated for the USDX versus the DJIA, Nasdaq and S&P 500, is 0.35, 0.39 and 0.38, respectively. Note that all of the coefficients are positive, which means that as the value of the U.S. dollar increases, so do the stock indexes, but only by a certain amount. Notice also that each coefficient is below 0.4, which means that only about 35% to 40% of the stock indexes’ movements are associated with the movement of the U.S. dollar.
List of High Positive Correlated Pairs
List of High Negative Correlated Pairs
Zero Correlation Stocks
Correlation can also be used for Portfolio Diversification. An investor can reduce portfolio risk simply by holding instruments which are not perfectly correlated. In other words, investors can reduce their exposure to individual asset risk by holding a diversified portfolio of assets.
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