Index Summary Message Fields

Index Summary messages contain values associated with start or end of day values. Effective date is included for reference. Bid and ask fields are not required. Each message will contain one or more Index Value Blocks.

Table 1. Index Summary Message Fields

Field Name	JSON	Value	Description
sendTime	sendTime	Numeric	Epoch time of value was published from system
transactionTime	transTime	Numeric	Epoch time the transaction occurred
messageType	msgType	"S"	S = index summary update
summaryType	summaryType	"1"	Type of summary 1 = SOD 2 = EOD
sequence number	seq	Numeric	Sequence identifier from Cboe Global Indices (Note: seq values will be increasing but not guaranteed to be without gaps). Reset is expected on restart or failover.
symbol	sym	Alpha	Index Symbol
IndexValueBlocks	values	JSON List	List of Index Value Block JSON objects, defined below

Table 2. Index Value Block Message Fields

Field Name	JSON	Value/Type	Description
type	type	Numeric	0 = bid 1 = ask 3 = index value
value	value	Number	Value associated with given index data point