4. Financial Instruments and Credit Risk Concentrations:

Financial instruments that are potentially subject to concentrations of credit risk consist principally of marketable securities, restricted cash, cash and cash equivalents, and receivables. Marketable securities, restricted cash, cash, and cash equivalents are placed with multiple financial institutions and instruments to minimize risk. No assurance can be made that such financial institutions and instruments will minimize all such risk.

Five tenants accounted for approximately 69% of receivables as of October 31, 2022 and July 31, 2022, respectively. During the three months ended October 31, 2022 and 2021, two tenants accounted for 30% and 29% of total rental revenue, respectively.