caution money

基本解释

All students are required to pay $350 as caution money at first registration.
所有学生须于注册时缴交港币三百五十元保证金。
Foreign currency caution money trades while having a lot of beneficial economy effect, it's oneself implication also is burning various risk.
外汇保证金交易在具有许多有益经济功效的同时，其自身也隐含着各种风险。
Therefore, resolve foreign currency caution money business marketplace risk, ensure the financial market norm working, to Chinese finance laws and statutes, construction significance is significant.
因此，化解外汇保证金交易的市场风险，保障金融市场规范运行，对中国金融法律，法规建设意义重大。

"In light of recent events and allegations that Mr. Hsu engaged in an illegal investment scheme, we have decided out of an abundance of caution to return the money he raised for our campaign, " read a statement by spokesman Howard Wolfson.
NPR: Clinton to Return Funds from Fundraiser Hsu
Money markets were also exhibiting extreme caution, as many banks continued to refuse to lend to one another on the fear that they would be let down by defaults.
FORBES: Europe Markets Brief
Buoyed by arms and money from sympathisers, the radicals have dropped their earlier caution.
ECONOMIST: Somalia and Ethiopia

a sum of money deposited as security for good conduct, against possible debts, etc

保证金
Fourth chapters are foreign currency caution money business assurance system.
第四章是外汇保证金交易的担保制度。