In the previous fiscal 2013-14, the total investment in equities stood at 9 per cent of the NPS corpus.
Total assets under management of the NPS currently stands at Rs 87,000 crore and 94 lakh subscribers have already been brought under its fold.
"We had seen 8-9 per cent of the NPS corpus invested into equity market in fiscal 2014, which had gone up to 12-13 per cent in FY15," Pension Fund Regulatory and Development Authority (PFRDA) Chairman Hemant Contractor said here.
Efforts are on to bring the investments into NPS under EEE (exempt, exempt, exempt) mode from the currently existing status of EET (exempt, exempt, tax) mode.
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"Some discussions have already taken place with the government on changing the investment being made into NPS from currently existing EET to EEE as we want to bring parity between investments being made into NPS and other financial products like mutual fund which already enjoy the status of EEE," Contractor said.
"However, we are yet to hear anything from the government on the issue," he added.
The government has provided an additional deduction of Rs 50,000 for contribution to the NPS.
The regulator is aiming at increasing the subscription under the social security scheme Atal Pension Yojana (APY) to the tune of 2 crore by the March from the currently existing mark of 2.9 lakh.