It took the total number of retail stock accounts to 4.03 million, or 4.09 percent of Vietnam’s population.
November was the ninth month in a row in which the number of new accounts topped 100,000.
In the year to date, 1.3 million accounts have been opened, triple the 2020 number.
Vietnam’s benchmark VN-Index rose to an all-time high of 1,500 points last month before pulling back to around 1,420 points now.
It has gained over 30 percent this year to become one of the best performers in Asia.