MCX, is a part of Financial Technologies group where as MCX-SX is now owned and controlled by institutional investors and not Financial Technologies.
There is a similarity that the promoters of MCX are also the promoters of the stock exchange MCX-SX.
Now I am going to define MCX and MCX-SX
Headquartered in Mumbai, Multi Commodity Exchange of India Ltd (MCX) is a state-of-the-art electronic commodity futures exchange. The Exchange has permanent recognition from the Government of India to facilitate online trading, and clearing and settlement operations for commodity futures across the country.
Having started operations in November 2003, today, MCX holds a market share of over 85%* (as on March 31, 2012 MCX had a market share of 86%) of the Indian commodity futures market.
MCX offers more than 40 commodities across various segments such as bullion, ferrous and non-ferrous metals, energy, and a number of agri-commodities on its platform.
MCX Stock Exchange Limited (MCX-SX), India’s new stock exchange, commenced operations in the Currency Derivatives (CD) segment on October 7, 2008 under the regulatory framework of Securities & Exchange Board of India (SEBI) and Reserve Bank of India (RBI).The Exchange is recognized by SEBI under Section 4 of Securities Contracts (Regulation) Act, 1956. In line with global best practices and regulatory requirements, clearing and settlement is conducted through a separate clearing corporation, MCX-SX Clearing Corporation Ltd. (MCX-SX CCL).
The currency derivatives segment at MCX-SX is supported by a strong membership base and witnesses a nation-wide participation. At the end of October 2012, MCX-SX had 750 members and saw participation from 745 towns and cities across India. As MCX-SX received permissions to deal in Interest Rate Derivatives, Equity, Futures & Options on Equity and Wholesale Debt Segment, vide SEBI’s letter dated July 10, 2012.
Trading in the ‘SX40’ index derivatives began from May 15, 2013. ‘SX40’, is a free-float based index consisting of 40 large-caps, liquid stocks representing diverse sectors of the economy. Its base value is 10,000 with the base date of March 31, 2010.