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W Market Data Snapshot Full Refresh

This message includes the full market data state for a single instrument. It can be sent in response to a Market Data Request <35=V> or can be unsolicited. If sent in response to a request, it should include the relevant MDReqID (262).

Multiple snapshots can potentially be used to provide updates in a subscription workflow, instead of Market Data Incremental Refresh <35=X>. In that case, each snapshot fully replaces the previous one. This potentially simplifies processing at the cost of additional bandwidth.

This message includes many optional fields. Firms can individually decide which optional fields they wish to support.

Structure

TagNameTypeRequiredDescription
Component
Required
262String
Conditionally required if this message is in response to a Market Data Request
55String
Required
65String
48String
22String Enum
167String Enum
Must be specified if a Future or Option. If a Future: Symbol, SecurityType, and MaturityMonthYear are required. If an Option: Symbol, SecurityType, MaturityMonthYear, PutOrCall, and StrikePrice are required
200MonthYear
Specifies the month and year of maturity. Required if MaturityDay is specified
205DayOfMonth
Can be used in conjunction with MaturityMonthYear to specify a particular maturity date
201Int Enum
For Options
202Price
For Options
206Char
For Options
231Float
For Fixed Income, Convertible Bonds, Derivatives, etc. Note: If used, quantities should be expressed in the "nominal" (e.g. contracts vs. shares) amount
223Float
For Fixed Income
207Exchange
Can be used to identify the security
106String
348Int
Must be set if EncodedIssuer field is specified and must immediately precede it
349Data
Encoded (non-ASCII characters) representation of the Issuer field in the encoded format specified via the MessageEncoding field
107String
350Int
Must be set if EncodedSecurityDesc field is specified and must immediately precede it
351Data
Encoded (non-ASCII characters) representation of the SecurityDesc field in the encoded format specified via the MessageEncoding field
291Char Enum
292Char Enum
387Quantity
Total volume traded in this trading session for this security
Component
Required
Number of entries following
Component
Required