You can find the FINRA Margin Disclosure Statement on the FINRA website.
Additional Information
Where can I find the FINRA Margin Disclosure Statement?
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Where can I find the OCC Risk Disclosure Statement and Acknowledgments?
Where can I find the IBKR Disclosure of Risks for Margin Trading?
Where can I find the CFTC Futures Risk Disclosures Statement?
Where can I find the Risk Disclosure Statement for Forex and Multi-Currency Accounts?