Technical Notice

Odd Lot Dissemination User Acceptance Tests

September 11, 2013

From 9 a.m. to 12 p.m. Eastern Time on Saturday, September 14, 2013, Saturday, October 12, 2013, and Saturday, October 19, 2013, market participants and data vendors are invited to test odd lot transaction reporting and dissemination for OTC securities.

In conjunction with the UTP Operating Committee (UTPOC) and Consolidated Tape Authority (CTA), FINRA will begin disseminating odd lot transactions via Trade Data Dissemination Service (TDDS) on Monday, October 21, 2013. To support odd lot trades, FINRA will introduce a new sale condition modifier, Odd Lot Trade ("I"), which will be available to any participant to distinguish a trade resulting from a market center's execution in increments less than the defined round lot size. Odd Lot Trade transactions will be included in volume statistical calculations only. The Odd Lot Trade modifier value "I" will appear in the Sale Condition field of TDDS transaction messages.

Testing Details

Authorized firms can enter and process test odd lot transactions and data vendors can process the transactions during the User Acceptance Tests (UAT). Firms reporting trades during the tests should use their production lines and vendors receiving TDDS data should connect via their production connection ports and circuits as outlined below.

Connectivity requirements (TDDS)

Group IP =
Port = 55360
Source IP =

To purchase a circuit, contact NASDAQ OMX Subscriber Services at (212) 231-5180, Option #3
If you connect via extranet, please contact your provider.

On the day of test, contact NASDAQOMX Technical Support at (212) 231-5180.

If you have questions about this notice, contact FINRA Product Management at (866) 899-2107.