For months I've been using a url like this, from perl:
http://finance.yahoo.com/d/quotes.csv?s=$s&f=ynl1 #returns yield, name, price;
Today, 11/1/17, it suddenly returns a 999 error.
Is this a glitch, or has Yahoo terminated the service?
I get the error even if I enter the URL directly into a browser as, eg:
http://finance.yahoo.com/d/quotes.csv?s=INTC&f=ynl1
so it doesn't seem to be a 'crumb' problem.
Note: This is NOT a question which has been answered in the past! It was working yesterday.That it happened on the first of the month is suspicious.
Yahoo confirmed that they terminated the service:
It has come to our attention that this service is being used in violation of the Yahoo Terms of Service. As such, the service is being discontinued. For all future markets and equities data research, please refer to finance.yahoo.com .