Single cell
=GOOGLEFINANCE("GOOG","price", "2019-05-01")Output as 2x2 cells
Date Close
01/05/2019 16:00:00 1168.08Use INDEX to extract only price into single cell
=INDEX(GOOGLEFINANCE("GOOG","price", "2019-05-01"), 2, 2)Output
1168.08Merge multiday results into single cell
This will generate 50+1 rows
=GOOGLEFINANCE("GOOG","price", "2019-01-01", 50)Date Close
02/01/2019 16:00:00 1045.85
03/01/2019 16:00:00 1016.06
04/01/2019 16:00:00 1070.71
07/01/2019 16:00:00 1068.39
...Extract price only
=INDEX(GOOGLEFINANCE("GOOG","price", "2019-01-01", 50), ,2)Close
1045.85
1016.06
1070.71
1068.39
...Calculate average
=AVERAGE(INDEX(GOOGLEFINANCE("GOOG","price", "2019-01-01", 50), ,2))1106.6056NOTE: You can also use MEDIAN, MIN, MAX, etc.