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I've seen symbols SPX and ^SPX, is there any significance for the symbol "^"?

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    The "^" prefix tells the quotation system to retrieve a quote for an index rather than a quote for a tradeable security. A quote for an index with be of a different format and source from a quote for a traded security. For example, ^SPX, ^DJI, etc... do not include things like bid and offer, company profiles, etc.... – Nick R Dec 31 '18 at 0:25
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    @NickR You’ve got a good answer here, so post it as an answer, not a comment. – Ben Miller Dec 31 '18 at 6:25
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Data providers and brokers use a different syntax for symbols. The caret means nothing.

Where it gets crazy is preferred stocks where there about a dozen conventions where there is a letter for the issue:

XYZ-A

XYZ_A

XYZ^A

XYZ+A

XYX.A

XYZprA

XYZ.prA

XYZ/A

XYZ'A

XYZ prA

XYZ_PA

etc.

I have no clue why they don'standardize this.

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