Stakes of two State owned Navratnas – NMDC and NALCO – are to be further disinvested. The Department of Disinvestment has invited bids from merchant bankers for further divesting the governments.The Government has decided to disinvest its 10 per cent paid up equity of NMDC through Offer for Sale of shares.The government currently holds 90 per cent stake in the country's top iron ore producer after it offloaded its 8.38 per cent holding in March 2010.AIR correspondent reports, the government has proposed to raise 30,000 crore rupees from disinvestment in the current fiscal. However, it has failed to come out with any public offering in first five months of 2012-13.Last fiscal, due to volatile market conditions, the government had to postpone the sell off process in some Public Sector Undertakings.It raised only 14,000 crore rupees in 2011-12 against a target of 40,000 crore rupees.