> For the complete documentation index, see [llms.txt](https://lti.gitbook.io/user_guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lti.gitbook.io/user_guide/zh-cn/xiang-guan-gai-nian/tou-zi-zhe-feng-xian-xian-e.md).
# 投资者风险限额
投资者可以为每项跟单订阅设置风险限额，以限制该订阅可能造成的损失。
风险限额是投资账户可因单项跟单订阅承受的最大亏损金额。
#### 风险限额计算
只要以下各项的合计金额未超过为该跟单订阅设置的风险限额，该订阅就会保持有效状态：
* 根据特定跟单订阅复制到投资账户的头寸所计算的已实现盈亏
* 根据相同头寸所计算的浮动盈亏
* 按照跟单订阅费用方案支付的费用总额
`（已实现盈亏 + 浮动盈亏 + 已支付费用）<= 风险限额数值`
如果超过风险限额，系统将按照以下流程自动终止跟单订阅：
* 关闭通过该跟单订阅复制到投资账户的所有未平仓头寸。
* 按照该跟单订阅的费用方案向投资者收取费用。
* 投资账户取消对主账户的订阅。
**示例**
假设投资者为某项跟单订阅设置了 $400 的风险限额。在某一时刻，投资账户的交易参数如下：
* 根据该跟单订阅复制到投资账户的头寸所计算的已实现盈亏为 $200。
* 根据该跟单订阅复制到投资账户的头寸所计算的浮动盈亏为 -$551。
* 投资者按照跟单订阅费用方案支付的费用总额为 $50。
`风险限额 = -$400`
`已实现盈亏 = $200`
`浮动盈亏 = -$551`
`已支付费用 = -$50`
`(200 - 551 - 50) > -400`
`-401 > -400`
由于超过风险限额，该跟单订阅将被终止。
\
风险限额用于触发跟单订阅的终止流程。投资账户的实际亏损可能与为该订阅设置的风险限额金额不同，具体取决于投资账户中未平仓头寸的实际平仓价格。
注意：英文原文示例中的 `-401 > -400` 在数学上不成立，应为 `-401 < -400`。正式发布前，建议向产品或开发团队确认风险限额公式以及比较符号。
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