Nasdaq Top of Market Feeds: ISE, GEMX and MRX

Three data product choices offering best bid and offer quotes.




Designed to provide best bid and offer quotes on the exchange, effectively calculating and displaying the market's best bid and offer position along with aggregated size.

View the U.S Derivatives price list.


  • Nasdaq ISE
  • Nasdaq GEMX
  • Nasdaq MRX


  • An astute perspective on the options market by providing firms with Best Bid and Offer Quotations.
  • Helpful administrative and market event messages to keep firms well informed such as:
    • Options Directory Messages that relay basic option symbol and contract information for those securities traded on the options market.
    • Security Open Messages that inform the user that the option symbol denoted in the message is available for auto execution within the options market system as soon as the opening auction process is complete.
    • Trading Action Messages that inform the user when a specific security is halted or released for trading on the options market.


Via Nasdaq Direct Data Feed Products:

Trading firms and market data vendors may create a real-time display by processing direct Nasdaq data feed products. For detailed technical documentation for Nasdaq direct products, please refer to the Market Data technical specifications page.

Via Market Data Vendors:

Individual investors and traders may access real-time data through a number of authorized Nasdaq market data distributors. Market data distributors provide both display devices and data feed products containing Nasdaq real-time data.

View the technical specifications and Nasdaq market data vendors.


To initiate this data on a data feed, firms must submit the appropriate documentation and receive prior approval from Nasdaq:

For the complete list of Nasdaq and UTP market data agreements and forms, please refer to the Nasdaq Global Data Products Agreements and Forms page.

To order this data on a stand-alone terminal/controlled display product, end users or end-user firms should contact their market data vendor for the appropriate agreements and forms.

Learn More About Nasdaq Top Quote Feeds

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