In Google Sheets, this is legal: =STOCKDATA("AAPL", "volume") # no date means today: a real time quote. And this is legal: =STOCKDATA("AAPL", "volume", "1/1/2021") # a historical quote. But this is not legal: =STOCKDATA("AAPL", "volume", TODAY()) As more attributes of options become available, this applies to =OPTIONDATA() as well.