Finance API

http://finance.yahoo.com/d/quotes.csv?s=AAPL+GOOG+MSFT

http://developer.yahoo.com/yql/guide/yql-code-examples.html

http://developer.yahoo.com/yql/console/?q=select%20*%20from%20yahoo.finance.quotes%20where%20symbol%20in%20(%22YHOO%22,%22AAPL%22,%22GOOG%22,%22MSFT%22)%0A%09%09&env=http%3A%2F%2Fdatatables.org%2Falltables.env

http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.quotes%20where%20symbol%20in%20(%22YHOO%22,%22AAPL%22,%22GOOG%22,%22MSFT%22)%0A%09%09&env=http://datatables.org/alltables.env&format=json

For example: (to get all stock quotes) (in XML) http://finance.yahoo.com/webservice/v1/symbols/allcurrencies/quote

in JSON) — just add format=JSON in the end of the url http://finance.yahoo.com/webservice/v1/symbols/allcurrencies/quote?format=json

http://blog.underdog-projects.net/2009/02/bringing-the-yahoo-finance-stream-to-the-shell/

http://gregnozik.blogspot.in/2011/09/yahoo-finance-api_23.html

http://www.yqlblog.net/blog/2009/06/02/getting-stock-information-with-yql-and-open-data-tables/

http://www.jarloo.com/yahoo_finance/

http://www.gummy-stuff.org/Yahoo-data.htm

http://sgxtradingdiary.blogspot.sg/2013/03/googlefinance-in-docs-fails-but-json.html