I find bloomberg providing information about some interesting quotes for example:
http://www.bloomberg.com/quote/JPMVXYG7:IND/chart/
The question is how could I extract the data like daily data from this chart, any idea?
You can get this into excel easily using the Bloomberg addin, this will give you a full years history.
=BDH("JPMVXYG7 Index","mid","2011-03-24","2012-03-23")