how the weightage of banknifty or nifty is decided is it fixed percentage decided by exchange or does it changes with the marketcap of companies.how the weight of a company is decided in index. one formulae could be
companys market cap*100
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total market cp of all the company in the index
if this is not then what is that logic
companys market cap*100
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total market cp of all the company in the index
if this is not then what is that logic