Shares of power companies NTPC, Power Grid, BHEL, Tata Power and Torrent Power surged up to 6 percent on February 15 after global brokerage firm Morgan Stanley shared bullish calls and raised their respective target prices. The brokerage firm upgraded BHEL to 'equal-weight' and raised its target price to Rs 220 per share, followed by an 'overweight' call on NTPC and a target upgrade to Rs 390