为永续合约现金余额注资，是指把 USDC 从你的代币现金余额转入永续合约现金余额，这样你就有了随时可用于交易永续合约的保证金。
两个余额都在同一个 fomo 账户里，所以这是应用内转账，而不是从外部充值。
如何转账
在移动端应用中，打开「投资组合」标签页，点击你的「现金余额」，然后点击「现金转账」。在网页端，打开你的个人资料页，点击「总现金」旁边的「转账」，或者打开页面顶部的现金菜单，点击「在代币与永续合约之间转移」。
你会看到两个余额并排显示，还有 10%、25%、50% 和 100% 按钮，可以按比例填入转出余额的一部分，你也可以直接输入金额。
弹窗标题显示转账方向。如果显示「永续合约转代币」，点击「切换」改为「代币转永续合约」。输入金额，然后确认：移动端滑动「滑动转账」，网页端点击「转账」。转账通常在几分钟内完成，到账后你的永续合约现金余额会更新。
最低金额、费用与时间
转入永续合约现金余额的最低金额是 5 USDC。在代币现金余额和永续合约现金余额之间转账没有 fomo 费用，并且通常在几分钟内完成，所以你可以根据需要随意来回转移资金。
转账进行中时，这笔金额可能会短暂地在两个余额中都不显示。这是正常的，它会自行到账，你不需要做任何事。
如果你的代币现金余额为空
如果你的代币现金余额中还没有任何 USDC，请先用「充值」页面上显示的任一方式充值，然后再回来转账。
你的第一笔转账
你第一次为永续合约现金余额注资时，fomo 会在后台创建你的永续合约账户。协议层面有 1 USDC 的账户创建费，但 fomo 替你承担了，所以你不需要花一分钱。转账完成后，你的永续合约现金余额就准备好了，你可以下第一笔单。
永续合约（"Perps"）由第三方协议提供，不向美国人士（美国公民、居民或任何身处美国的人）开放。请勿尝试从美国境内访问永续合约。
For purposes of these Terms, a "U.S. Person" means: (i) any natural person resident in the United States; (ii) any citizen or permanent resident of the United States, including any such person temporarily located outside the United States; (iii) any entity organized or incorporated under the laws of the United States or any state thereof; (iv) any estate of which any executor or administrator is a U.S. Person; (v) any trust of which any trustee is a U.S. Person; (vi) any agency or branch of a non-U.S. entity located in the United States; (vii) any discretionary or non-discretionary account held by a dealer or fiduciary organized, incorporated, or (if an individual) resident in the United States; or (viii) any entity organized or incorporated outside the United States that is formed by a U.S. Person principally for the purpose of investing in unregistered securities or derivative instruments. "United States" means the United States of America, its territories and possessions, any state of the United States, and the District of Columbia.
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