There are a few reasons why you may see null data points appearing when querying the Quote endpoint:
- For Nasdaq-listed stocks only, delayed data (including OHLC & Extended Hours data) is only available through IEX Cloud if you are authorized by UTP directly. You can read more about this agreement here: https://iexcloud.zendesk.com/hc/en-us/articles/1500012484401-How-do-I-get-Nasdaq-listed-stock-data-UTP-Data-on-IEX-Cloud-
- You may also see null data points when viewing intraday prices and this indicates that no trades took place within the Investor's Exchange during that minute.