Instrument Discovery

SecurityListRequest (35=x)

Purpose:
The SecurityListRequest message retrieves the complete catalog of tradeable instruments from the platform. This is typically the first operation after authentication, as it provides the universe of securities available for trading, quoting, and market data subscription.

When to Use:

Immediately after successful logon to discover available instruments

Periodically to refresh instrument data (e.g., new listings, delistings)

Before building trading UIs or instrument selection menus

To obtain ISINs, maturity dates, and other security identifiers

Business Context:
In fixed income and structured products trading, knowing which instruments are available and their characteristics (ISIN, maturity date, currency) is essential. The SecurityListRequest provides this foundation, enabling clients to build order entry systems, pricing engines, and risk management tools. The response includes only enabled instruments, ensuring clients don't attempt to trade delisted or suspended securities.

Message Flow

SecurityListRequest Tags

Tag	Name	Required	Description
320	SecurityReqID	Y	Unique identifier for this request
559	SecurityListRequestType	Y	4 = ALL_SECURITIES

Example Request

8=FIXT.1.1|9=XXX|35=x|
320=SR-123456|559=4|
10=XXX|

SecurityList Response (35=y)

Tag	Name	Required	Description
320	SecurityReqID	Y	Echoed from request
146	NoRelatedSym	Y	Number of instruments

Repeating Group (NoRelatedSym):

Tag	Name	Required	Description
55	Symbol	Y	Instrument name
48	SecurityID	Y	ISIN code
22	SecurityIDSource	Y	4 = ISIN
541	MaturityDate	Y	Maturity date (YYYYMMDD)
107	SecurityDesc	N	Additional info (CurrencyPairID)

Example Response

8=FIXT.1.1|9=XXX|35=y|
320=SR-123456|
146=2|
55=EUR/USD Swap|48=EU0009652627|22=4|541=20241231|107=CurrencyPairID: abc-123|
55=GBP/USD Swap|48=GB0002374006|22=4|541=20241231|107=CurrencyPairID: def-456|
10=XXX|

SecurityListRequest (35=x)#

Message Flow#

SecurityListRequest Tags#

Example Request#