Use TSE:123 or ASX:XYZ instead of ticker 123.TO or XYZ.AX. Reuters Instrument Codes are no longer supported. If the exchange symbol is not specified, GOOGLEFINANCE will use its best judgement to choose one for you. For example, use “NASDAQ:GOOG” instead of “GOOG.”
It’s mandatory to use both the exchange symbol and ticker symbol for accurate results and to avoid discrepancies.
Ticker - The ticker symbol for the security to consider. GOOGLEFINANCE('NASDAQ:GOOG','price',TODAY()-30,TODAY())
Fetches current or historical securities information from Google Finance.