``The exchange is working out the various modalities like a clearing corporation for the debt market and the trading pattern for various debt securities in order to facilitate non-institutional investors to trade in debt market,'' NSE deputy managing director Ravi Narain told PTI.

NSE debt market segment could not take off due to various legal provisions like the issue of stamp duty which makes trading in debt market unattractive.

Narain said in the current year there has been an increase in trading volume on the exchanges debt segment.