missing data in historics
It's great that Yahoo tries to provide useful information for it's users but:
It is hard to follow price action at the best of times so it's not very helpful when lines of data just disappear from your Yahoo pages. eg: The FTSE historics page had the data for 13/08/2019 in view yesterday but it has gone today and skips from Mon 12th to Wed 14th. Your software needs to find errors like this and fix and prevent further occurences. Also, I find there are hundreds of instances where, say, a stocks open or close price is higher than the recorded highest price or, conversely, lower than the lowest recorded price. How can this happen unless your software is not properly tested? come on 'Yahoo', surely you can do better than this for us...
This is the first improvement you should aim for if you wish to be a serious data and information provider.
Please send us the URL of the stock that you are referring to so we can further investigate this matter. Thanm you!