Stock Market Index: Meaning, Importance & Types of Market Indices

The market index or stock market index gives insight with respect to understanding market performance and stock market investor sentiment. Market indices are used very often in the field of stock market and these are statistical measures that indicate fluctuations that take place within the market. The stock market index is a hypothetical grouping of investment holdings. It is only a representation of the part of the actual financial market.Stock market investors end up following market indices in order to study movements that occur within the market. In order to compare the stock performance, the market indices will then be used for performance benchmarks.

A stock market index is formed after combining equities with similar market capitalisations , industries or business sizes. The index is computed based on the stock pick. Every stock comes with a distinct price. The price range for one stock is not the same as the price range is another stock. Resultantly, the index value is not determined by adding prices of all stocks.This is when weights are allocated to stocks. Every stock on the index is assigned a certain weightage based on the current market price or market capitalization. The weight goes on to define the impact of stock price fluctuations that take place on the index value. The two most important stock market indices are- market cap weightage and price weightage.Also Read: Advantages and Disadvantages Of Investing In Stock Market

The market indices help to track the performance of the market segment or the total market. They act like markers. Below are mentioned some categories of stock market indices:

• Sectoral Index NSE and BSE have strong indicators that measure companies within a sector. Indices such as the S&P BSE Healthcare and NSE Pharma are good indicators of change within the pharmaceutical sector.
• Benchmark Index The Nifty 50 index comprising the best 50 performing equities and BSE Sensex Index which comprises 30 best-performing stocks are markers of the NSE and BSE. The group of equities employ the best standards when it comes to regulating companies selected and are thus referred to as benchmark index.
• Market Cap Index Some indices choose companies based on market capitalization. Market capitalization refers to stock exchange values of publicly traded corporations.
• Other Indices Several indices such as BSE 500, S&P, S&P BSE 100 AND NSE 100 are larger and have a greater number of stocks that are listed on them.

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• Stock-picking Made Easy: Since there are thousands of stocks listed on the exchange without a benchmark it is not easy to differentiate one stock from the other. This makes investment difficult. Thus, stock market indices help to classify the stock basis sectors, type of industry, size of companies and the like.
• Sets Comparative Parameters: One should be aware if the stock investment is worth the money prior to including it as part of the portfolio . Comparing the stock with an index gives an idea of its performance, For Example, if the stock leads to higher returns compared to the index, it outperforms the index.
• Proxy: Equity investments always come with a risk. However, probing into each and every stock to reduce volatility is not an ideal solution. NSE Nifty and BSE Sensex are benchmark indices in India.
• Investor Sentiments are Reflected: Gauging investor sentiments taken on significance when the investor plays a role in equity markets. If one is interested in investing in a specific stock, one needs to be well aware of the dynamics of the stock price.

Some of the significant indices are:

• Market-capitalisation-based indices, including BSE Mid Cap, BSE Small Cap
• Benchmark indices that include NSE Nifty and BSE Sensex
• Broad-based indices that include Nifty 50 and BSE 100
• Sector-based indices that include Nifty FMCG and CNX IT

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Indices are important for the Indian stock market because they help to analyse market and stock performance. The indices help the interested investor to compare market performance of the stock with respect to benchmark stock within that sector. One can ascertain the profitability of the stock compared to other ones within the same index or when it is riskier than the peers.

Stock market indices are very important because they save investors the hassle of having to search for profitable stocks where they can invest in. The stock index makes stock market investment smooth and for investors. However, investors are always advised to assess risk profiles and make investment portfolios accordingly.