What percentage of the total assets held by 44 nontraded REITs as of March 31, 2023, were held by the largest five REITs, in terms of assets?
Answer: Approximately 80.1% of the total assets held by 44 nontraded REITs as of March 31, 2023, ($236.4 billion) were held by the largest five REITs ($189.3 billion).