Explanation:

• The National Stock Exchange (NSE) has acquired a 26% equity stake in the Indian Gas Exchange (IGX), through its wholly owned subsidiary NSE Investments. 
• With this, NSE has become a co-promoter and the second largest shareholder on the IGX gas-trading platform.
• The Indian Energy Exchange (IEX), which set up the IGX natural gas trading hub, has 54 percent share holding in IGX.