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The landscape of stock market data features contributions from multiple prominent entities, ensuring that investors receive accurate and timely information. One key player in this domain is BATS, which supplies a significant portion of stock quote data. In the U.S., real-time data for market indices is the norm, with the exception of the S&P 500, which undergoes updates every two minutes.

FactSet Research Systems Inc., known simply as FactSet, plays a crucial role in the financial sector by safeguarding its proprietary rights over collected data. Chicago Mercantile Exchange Inc., along with its licensors, holds exclusive ownership over certain other market data, highlighting the blend of various authoritative sources in market analytics.

The Dow Jones branded indices, calculated and distributed by DJI Opco, a subsidiary of S&P Dow Jones Indices LLC, bring another layer of exclusivity. These indices are marketed under license by S&P Opco, LLC to notable entities such as CNN. It is important to note that Standard & Poor's (S&P) and Dow Jones are embedded trademarks within the financial industry, with substantial corporate backing from Standard & Poor's Financial Services LLC and Dow Jones Trademark Holdings LLC, respectively.

Fair value calculations, another vital component of market data, are provided by IndexArb.com. Moreover, essential market holidays and trading hours information is furnished by Copp Clark Limited, ensuring that stakeholders are well-informed of schedule alterations. This collaborative effort of various entities fuels the engine of the stock market, enabling precision and efficiency in financial transactions worldwide.