On what basis adjusted closing price calculated for stocks and index?

Question

On what basis adjusted closing price calculated for stocks and index?

Answer 1

The closing index is computed at the end of `continuous trading session’ on the basis of official closing prices of components stocks. The algorithm to calculate the closing prices is as follows:

if 20 market lots have been traded during the last 15 minutes, then the weighted average price for the last 20 market lots would be considered,

if 20 market lots have not been traded, but at least 10 trades have taken place during the last 15 minutes, the weighted average price for the last 10 trades would be considered,

if 10 trades have not taken place during the last 15 minutes, but have taken place during the last 30 minutes, the weighted average price for the last 10 trades would be considered,

if 10 trades have not taken place but at least one trade has taken place during the last 30 minutes, the weighted average price of all trades in the last 30 minutes would be considered, and

if there are no trades during the last 30 minutes, then the last traded price would be taken as the official closing price.

Weighted average price, calculated as above, would be rounded off to the nearest tick.

Answer 2

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Answer 3

Average of last 15 minutes of trading .