+**13c3** refers to a critical [SEC](/wiki/SEC) rule designed to safeguard client assets within the financial industry. It mandates [Broker-Dealer](/wiki/Broker-Dealer) firms to maintain adequate reserves, ensuring the protection of customer funds and securities.
+## See also
+- [Financial Regulation](/wiki/Financial_Regulation)
+- [Custody](/wiki/Custody)
+- [Securities](/wiki/Securities)
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