leading period, for instance .DJI is the Dow Jones Industrial Average. Confusingly the "dot notation" is also used for a number of other purposes. Units are signified with a ".UN", and a particular exchange like NASDAQ by ".OQ". This confusion seems to be the result of Refinitiv attempting to merge the standards used by the wide variety of services they purchased in the 1980s and 90s. Other examples: WMT.N means shares of Wal-Mart traded at the New York Stock Exchange (N) Examples of indices: .DJI Dow Jones Industrial Average .IXIC NASDAQ Composite Index .SPX S&P 500 Examples of commodity futures: CL crude, light oil GC gold HU unleaded gasoline HO heating oil Antitrust issues In November 2009, The European Commission opened formal antitrust proceedings against Thomson Reuters to investigate whether Thomson Reuters could be abusing its dominant position in the market for consolidated real-time datafeeds through its RIC licensing practices, in breach of EU antitrust rules. In December 2012, the European Commission accepted Thomson Reuters proposal to remedy those concerns. The EC’s announcement brought the matter to a close, with no finding of liability. In summary, the proposal involves Thomson Reuters agreeing to offer its customers specific licence rights to continue to use its RICs in applications with data from an alternative real time consolidated data feed provider to which they have moved. See also Ticker symbol CUSIP SEDOL ISIN NSIN Option symbol Uniform Symbology CNBC Ticker References Instrument Code Security identifier types Financial metadata