Yahoo! Finance – Yahoo Stock Quote API (CSV)
http://finance.yahoo.com/d/quotes.csv?s= a BUNCH of STOCK SYMBOLS separated by “+” &f=a bunch of special tags **s=SYMBOL**: where SYMBOL is the actual stock symbol (e.g. 0001.HK) **f=REQUESTED_FORMAT_STRING** where the REQUESTED_FORMAT_STRING is a string of letters representing what fields to be requested. for example: http://finance.yahoo.com/d/quotes.csv?s=XOM+BBDb.TO+JNJ+MSFT&f=snd1l1yr where some special tags are (thanks to Mike): a Ask a2 Average Daily [...]