Shares of almost all public sector undertakings have given up gains and are down an average 20 per cent from their 2014 highs. Worryingly for the government, which intends to raise over Rs 43,000 crore through PSU disinvestment in the next seven months, shares of some of the shortlisted candidates such as Steel Authority of India , Rural Electrification Corporation , Power Finance Corporation and NHPC have lost significant ground.