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Tuesday, September 12, 2017

Data Technical News #2017 - 26
Update: Nasdaq Updates Data Feed Specifications for October Launch of IEX Listings Market

Markets Impacted:

Products Impacted:

  • Multiple Data Feeds

Contact Information:

What you need to know:

Update 10/06/2017: The Investors Exchange LLC (IEXG) has delayed the launch of its plans to transition to a Listings Market. Pending SEC approval, IEX will now begin the Phase-in Period as a primary listing exchange on Monday, November 6, 2017.

Nasdaq will modify its systems to support the IEX listings market code of “V” on its proprietary data feeds.

Testing is currently available in the Nasdaq Testing Facilities. The new IEX-listed test instruments will be available in production on Monday, October 9, 2017.

What changes is Nasdaq making to accommodate the new listing market?

The Investors Exchange LLC has notified the industry of its intent to transition to a Listings Market on Monday, October 9, 2017. At the consolidated level, IEX listed securities will be disseminated via Network B of the Consolidated Tape Association (CTA). IEX will continue to use the one-character market center identifier of “V” and the ISO 10383 Market Identifier Code (MIC) of "IEXG" as they transition to a listings market.

How will this affect Nasdaq proprietary data feeds?

Nasdaq supports the trading of CTA Network A and B securities on The NASDAQ Stock Market (NASDAQ), Nasdaq BX (BX) and Nasdaq PSX (PSX) platforms.

Nasdaq is, therefore, making the modifications to support the “V” code within the following proprietary data feed messages:

Data Feed Message(s) Impacted
TotalView-ITCH Feeds:
Stock Directory (Type R) – Market Category field
Nasdaq NOIView and Nasdaq Net Order Imbalance Snapshot (NOIS) Stock Directory (Type R) – Market Category field
Nasdaq TotalView-Aggregated and Nasdaq Level 2 Stock Directory (Type R) – Market Category field
Basic Quote Feeds:
Stock Directory (Type R) – Market Category field
Stock Trading Action (Type H) – Security Class field
QBBO Quotation (Type Q) – Security Class field
Last Sale Feeds:
Stock Directory (Type R) – Market Category / Market Tier field
Stock Trading Action (Type H) – Security Class field
Trade Report – Non-NextShares (Type T) - Security Class field
Trade Cancel/Error – Non-NextShares (Type X) - Security Class field
Trade Correction – Non-NextShares (Type C) - Security Class field
Adjusted Closing Price (Type G) - Security Class field
NLS Plus End of Day Trade Summary (Type J) - Security Class field
IPO Information (Type I) – Security Class field
Nasdaq Market Pathfinders Stock Directory (Type R) – Market Category / Market Tier field
Stock Trading Action (Type H) – Security Class field

In addition, Nasdaq will be modifying the following proprietary data feeds to support the "IEXG" MIC:

Data Feed Message(s) Impacted
Nasdaq Global Index Data Service (GIDS) Issue Symbol Participation (Category A – Type D) – Market of Origin field
ETF Directory (Category A – Type E) – Market of Origin field
Mutual Fund Dissemination Service (MFDS) Symbol Directory (Category A – Type D) - Listing Market Identification Code (MIC)
Nasdaq Daily List Nasdaq Equities Daily List(s) – Listing Market Center and Delisting Reason fields
MFQS Daily List / MFQS Registration Service MFQS Daily List file(s) -
  • Listing Market Identification Code (MIC) – Current
  • Listing Market Identification Code (MIC) – New fields
MFQS Symbol Directory file -
  • Listing Market Identification Code (MIC)
Nasdaq Global Index Watch (GIW) Weightings Plus Data Service– Exchange (MIC) field
Unified File Format (UFF) – Exchange field

Please refer to the Nasdaq Data Feeds Specifications page for additional information regarding impacted data products.

How will this affect the UTP data feeds?

The UTP data feeds will not be affected by the launch of IEX as a Listings Market as the SIAC acts as the securities information processor (SIP) for Network B securities.

Will there be testing opportunities?

Update 10/05/2017: Testing is currently available in the Nasdaq Testing Facilities. The new IEX-listed test instruments will be available in production on Monday, October 9, 2017.

Where can I find additional information?

For questions about Nasdaq data products, please contact Nasdaq Global Information Services at +1 301 978 5307.



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