historical data show 0 on open, high , low
many .BK quote (i think more than 100) shows "0" on open or high or low
in the latest day of historical
for example
https://finance.yahoo.com/quote/MAJOR.BK/history?p=MAJOR.BK&.tsrc=fin-srch
https://finance.yahoo.com/quote/AOT.BK/history?p=AOT.BK&.tsrc=fin-srch
https://www.imgtrue.com/image/eWwD49
https://www.imgtrue.com/image/eWwAce
69th
ranked

Thank you for your report, we have escalated this issue to our engineers.