Nasdaq Preps Old Symbology Feed Shutoff

Nasdaq OMX is encouraging clients to upgrade to symbology-compliant versions of its datafeeds by Dec. 31, as the exchange will retire non-compliant versions on that date. In other news, the exchange last week restated index values for its Green Economy indexes last week after discovering a error in the calculation of high and low values for the indexes on Nov. 11 and 12. To amend the error, the exchange advised users and vendors to delete intra-day values from their historical databases for

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