Since taking a PSU to the market takes three to six months of administrative paperwork, the disinvestment department had requested markets regulator Sebi to give an extension to the draft red herring prospectus filed by NHPC and OIL. Power secretary HS Brahma said, “NHPC’s IPO will come in August; the company has already started roadshows.” NHPC hopes to raise Rs 1,670 crore by selling 10 per cent of fresh equity capital. The government will divest 5 per cent of its stake.