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Tuesday, March 11, 2025

Data Technical News #2025 - 7
Nasdaq PHLX Options Announces Changes to Depth of Market Symbol Ranges Beginning March 17, 2025

Markets Impacted:

  • Nasdaq PHLX Options

Products Impacted:

  • Nasdaq PHLX Options Depth of Market Feed

Contact Information:

What you need to know:

Effective 03/17/2025, PHLX Depth of Market Feed channels 9 and 10 will be rebalanced to optimize market data distribution in both A and B feeds.

What is changing?

Symbol distribution will be rebalanced across channels 9 and 10 with the following changes:

  • Channel 9: currently supporting K-M, will now support K-MSFT
  • Channel 10: currently supporting N-N, will now support MSFU-N

Symbol distribution effective March 17th, 2025:

PHLX Depth of Market

UDP/IP Protocol Standard: MoldUDP64

Symbology Compliant: Yes

Initial Release Date: July 2, 2012
Site Channel/Purpose Group Port Source IP Address

New York Metro Area - "A" Feed

RP: 207.251.255.48
A Feed 1 Broadcast - Channel 9 (K - MSFT) 233.47.179.100 18009 206.200.151.128/27
Rerequest UDP - Channel 9 (K - MSFT) 18109 206.200.151.14
Rerequest TCP - Channel 9 (K - MSFT) 18109 206.200.151.14
Broadcast - Channel 10 (MSFU - N Excludes NDX) 233.47.179.137 18010 206.200.151.128/27
Rerequest UDP - Channel 10 (MSFU - N Excludes NDX) 18110 206.200.151.64
Rerequest TCP - Channel 10 (MSFU - N Excludes NDX) 18110 206.200.151.64

New York Metro Area - "B" Feed

RP: 207.251.255.58
B Feed 1 Broadcast - Channel 9 (K - MSFT) 233.47.179.164 18009 206.200.151.192/27
Rerequest UDP - Channel 9 (K - MSFT) 18109 206.200.151.78
Rerequest TCP - Channel 9 (K - MSFT) 18109 206.200.151.78
Broadcast - Channel 10 (MSFU - N Excludes NDX) 233.47.179.201 18010 206.200.151.192/27
Rerequest UDP - Channel 10 (MSFU - N Excludes NDX) 18110 206.200.151.69
Rerequest TCP - Channel 10 (MSFU - N Excludes NDX) 18110 206.200.151.69

Chicago Metro Area "A" – U.S.

RP: 207.251.255.97
Broadcast - Channel 9 (K - MSFT) 233.187.20.96 18009 206.200.95.0/25
Rerequest UDP - Channel 9 (K - MSFT) 233.187.20.96 18109 206.200.92.132
Rerequest TCP - Channel 9 (K - MSFT) 233.187.20.96 18109 206.200.92.140
Broadcast - Channel 10 (MSFU - N Excludes NDX) 233.187.20.96 18010 206.200.95.0/25
Rerequest UDP - Channel 10 (MSFU - N Excludes NDX) 233.187.20.96 18110 206.200.92.248
Rerequest TCP - Channel 10 (MSFU - N Excludes NDX) 233.187.20.96 18110 206.200.92.249

Chicago Metro Area "B" – U.S.

RP: 207.251.255.98
Broadcast - Channel 9 (K - MSFT) 233.187.20.104 18009 206.200.95.128/25
Broadcast - Channel 10 (MSFU - N Excludes NDX) 233.187.20.104 18010 206.200.95.128/25

These changes will also be reflected on Nasdaq UDP/IP Address Page.

When will the changes be effective?

Changes will be effective prior to market open starting March 17th, 2025

What product will this impact?

PHLX Depth of Market Feed only.

Will there be a testing period?

No testing will be required since this is a minor configuration change.

Why is Nasdaq making these changes with short notice?

Due to increased market volatility, channels 9 and 10 on the Nasdaq PHLX Options Depth of Market Feed will be rebalanced to optimize the market data traffic across channels.


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