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Suffixes indicating class, preferred, new, etc., are well defined for NASDAQ and NYSE, but I can't find anything documenting the meanings of the trailing punctuation. For example, here's some that I saw in today's feed from NASDAQ:
What you are seeing is the Nasdaq Ticker Symbol conventions for CQS securities. You can essentially translate them at the below link:
http://www.nasdaqtrader.com/Trader.aspx?id=CQSSymbolConvention
