I just came across this. The new exchange IEX is providing free market data. I think this is the type of data people pay lots of money for.
They have a web page with most active quotes http://ift.tt/2paxnku
Also an API that will return individual quotes, example http://ift.tt/2oJQFBj so you could make an excel document with live upto the second quotes.
They limit each IP to 5 requests per second, but one request can include all available tickers.
Details here: http://ift.tt/2pa4uVJ
Submitted April 07, 2017 at 12:35PM by ron_leflore http://ift.tt/2oJWQFg
