Difference between XNAS / XNMS etc
I gather that NASDAQ is a stock market (symbol XNAS?). But then I hear about other markets like 'NASDAQ Capital Market' (XNCM) and 'NASDAQ/NMS Global Market' (XNMS), etc. What is the difference? Are they all 'submarkets' of NASDAQ, or are they separate markets with a common origin, or what?
Thanks!