Anyone know of a respectable, free API for querying financial index performance data? My company has access to Thomson Reuters and Ibbotson, but I want to compare some of the data in these reports for consistency. I have used gdata with the Google Finance API, but it is no longer available. Anyone have any good suggestions?
How about <a href="http://www.quandl.com/" rel="nofollow">http://www.quandl.com/</a> ? They have plenty of financial index data and a decent API.