It is really lame that huge sites (Bloomberg, Yahoo Finance, CNBC, CNN, Marketwatch...) can't easily show what markets are closed. Instead they show changes (which imply changes today) that are often for the previous day. So half an hour before a market opens the display indicates it has returned whatever it returned yesterday. And if the market is closed that day, all day long the display acts as though it has the return it did that last day it was open.
continue reading: Poor Web Site User Experience (Ux)