The National Stock Exchange (NSE) on Monday asked rival BSE to provide reasons for the spurt in trading volumes in its shares. BSE is exclusively listed on NSE.
A total of 663,361 BSE shares were traded on Friday, 13 times more than its previous four-day trading volumes.
"Significant increase in volume has been observed in BSE. The exchange, in order to ensure that investors have latest relevant information about the company and to inform the market place so that the interest of the investors is safeguarded, has written to the company," NSE wrote to BSE.
In its reply, the BSE