Hi,
To be clear.
Stock Options prices are no longer available in Numbers since June.
Apple's stock markets prices, both through the Stock App on the iPhone and globally in Numbers, have a 20 minute delay (this is normal). All Yahoo finance is delayed 20 minutes.
I am guessing that the inclusion of this function in Numbers may have hammered Yahoo's finance server. Yahoo seems to be quite sensitive about the use of its financial data and it is always somewhat unreliable at the best of times - even more so if someone starts using it. I'm surprised Apple is using it and you might have thought that Yahoo would have treated Apple as some form of executive client (since one assumes, Apple is paying a premium to grab the data) but it appears not.
Anyway, really irritating that this function is no longer avalaible...
I still do not know why Apple did not buy Yahoo's financial services when they had the chance but ...