Under the national banking act after national banks deposited government bonds with the US Treasurer they could issue currency up to what percent of the value of the bond?

Under the National Banking Act, national banks could issue currency up to 90% of the value of the government bonds they deposited with the U.S. Treasurer. This provision was designed to facilitate the issuance of a stable national currency backed by government securities. The act aimed to create a uniform banking system and promote confidence in the nation's financial system.